EP0907150A2 - Method for the verification of security prints - Google Patents

Abstract

A method for checking security imprints comprises steps for entering and encrypting information printed on the mail piece, a crypto number and generating a mark from the crypto number, and comparing the generated mark with the printed mark. The information printed on a piece of mail can be automatically entered into an evaluation device (23) using a suitable reading device (24). <IMAGE>

Description

The invention relates to a method for verification of security imprints in which in the preamble of Specified claim 1 type. The method comprises Steps for entering and encrypting information, that are printed on the mail piece, too a crypto number and generating a mark from the Crypto number, as well as the comparison of the generated with the printed mark. The one on a piece of mail printed information can with a suitable Reader automatically entered into an evaluation device become.

The invention relates in particular to franking machines, which generated a fully electronic impression Franking of postal items including reprinting one Deliver advertising clichés and a marker. The franking machine is with at least one input means, an output means, an input / output control module, a memory for at least one advertising cliché, one Control device and a printer module equipped.

A franking machine usually creates an imprint right-justified in a form agreed with Swiss Post, starting parallel to the upper edge of the mail with the content of postage in the postmark, date in Daily stamps and stamp impressions for advertising slogan and if necessary, type of shipment in the election stamp. The post value that The date and the type of shipment form the according to the variable to be entered in the mail item Information.

The post value is that of the sender prepaid transportation fee (franking), the one taken from the refillable credit register and at Postage is used.

The date is a current date or a future date in a postmark. While the current date of a clock / date block automatically provided, must be in a manual Predating a setting of the desired one future date. Interesting is the pre-dating in all cases where the advent occurs Postage processed and franked very early, but too must be dispatched to a specific date. The embedding of the variable data for the date in the In principle, day stamps can also be used for printing of the postal value.

The approved advertising clichés can send a wide variety of messages Kind contain, especially the Address, company logo, mailbox and / or one any other message. Acting in the advertising cliché it is an additional one in the postal sense Information to be agreed with the postal authority.

It is well known that an advertising message is based on a fixed printing block is applied by the User can be replaced. Such a machine provides a distinctive fingerprint. It would be pointless to print with a modern color copier copy, because even if the postage and additional the serial number can be faked by the distinctive Fingerprint to determine the machine which is imitated with the intention of forgery. To be a solution described in DE 38 40 041 the not constantly changing imprints of the Clichés applied to a printing drum and the variable parts of the cliché (characteristic data) on electronic Paths generated and via a thermal printer printed on. The characteristics are purely mechanical assigned to a specific place in the cliché.

As is well known, the difficulty of advertising messages change without reducing fee security to effect purely mechanically by the replacement individual line castings carrying a text be solved. But that is too time consuming and would lead to a print interruption. On the other hand would be such a change in fully electronic impact-less printing processes much faster possible.

A franking machine message printing system is already known from DE 37 12 100 known, the ones to be printed Characters, a postage charge, and a remote Include message. The electrical franking machine is with a franking machine clearing circuit, which delivers the postage value, with a Telephone or transmission connection, with a message input device, with a transmission control system, with a printer and with a memory equipped. The memory delivers the message, therefore the characters to be printed are at least partially printed based on data stored in memory.

With that between the transmission port and the memory switched transmission control system can do that Advertising cliché can be selectively changed by the data center, when using the message input device the data center via the transmission connection is forwarded to the verification of the coded Requirement in the data center was positive and that of Data center transmitted message in the franking machine has been checked. Also has been proposed the possibility of a third party To allow advertising on your own post by the Space for the franking machine message rented becomes. The data center then becomes the message of one Transmitted to third parties. The data center needs the message of the third party to the franking machine and checked also the use of the message in the Franking machine. But there are always measures required to ensure that the connection the embassy is maintained authorized and that the data is correct.

Without a data center review, there is none Change of message possible. Because the store is directly connected to the printer and the The user can save print data for the message do not check which print data is currently in memory are saved. Also, the use of the like stored message from the user of the franking machine cannot be controlled arbitrarily.

Selective change in the memory saved advertising message must either the pixel data for the advertising message completely new from one Central are transmitted, the number of Print is monitored, or the one to be printed Advertising message is hand in using a keyboard entered a memory to successively save the Print postage, date and text lines.

The disadvantage here is that manual changes Input information the previous old input information is lost. Only on at the headquarters saved advertising messages can then be used become. Another disadvantage is that the change is not can be done without interruption. The squeeze is electronically and mechanically complex. The usage on the one hand from printing drums or on the other hand from Dot matrix printers also leads to an undesirable one Noise pollution.

The inner structure of the printing drum, the dials already for the postage value and the date, would also be so complicated that already suggested was a separate one in the plate printing drum arrange second printer. From US 3 869 986 known a second printing the variable data Use an inkjet printer.

An electronic franking machine is known from US 4,580,144 known with two thermal printing devices, with the first the fixed part of the printed image (postal code and picture frame) and with the second one variable print image part (postage and date) one after the other to be printed. Through this division and separate The treatment of variable and constant data can Print speed can be increased. However is due the missing fingerprint hereby no security print already given in itself. Rather, one would have to additional marking can also be printed.

In a franking machine known from US 4,746,234 are fixed and variable information in Storage means (ROM, RAM) are stored, then if a letter is on the transport path before the print position actuated a microswitch by means of a Microprocessor read out and around a pressure control signal to build. Both are then electronically one Print image composed and can by thermal pressure medium on an envelope to be franked can be printed out. With very many to be integrated variable window print image data is delayed Formation of the pressure control signal accordingly. The at constant postal data maximum achievable Print speed is particularly affected by the time required for the formation of the pressure control signal limited. There would have to be an additional material effort operated or reducing the printing speed be accepted if a Crypto number should be calculated in order to get a Generate marking for a security imprint. In both cases would be for such a machine (higher Price and / or too slow) ultimately a lack Customer acceptance expected.

An automatic transmission system is known from EP 294 397 known with user (chip) cards. The user cards are with a microprocessor and a data output unit Mistake. The franking machine points a terminal for the user cards with a value processing section, Programming means for card microprocessor and a processing section microprocessor for execution of a programmed handling procedure on, with a graphic from the card memory by Terminal is loaded into the printer memory. The possibility there is only a change in the graphics as a whole, d. H. about reloading an externally modified one Postage stamp including postmark using user cards. With new advertising clichés here Security itself cannot be increased. Such one can be easily generated electronically. On the other hand would change a cliché on manipulation Clues. To evaluate such, but is through the postal authority has not yet envisaged here.

DE 38 23 719, on the other hand, is a security system for use with a character printing authorization device known. A computer of the franking machine is a memory for the data to be loaded Graphic change and the date of the associated date. When the user requests a change in funds searched, is opened by the computer of the franking machine an external dialing device via a connecting device (Modem) accessed a selection of one too character pattern. It is intended that the printed character pattern to check security the authorization of the franking machine becomes. But here is all of that printed printed image from the Post office evaluate what is only with a high Effort is possible.

On the other hand, for franking machine printing already suggested certain hidden or crypted characters, bar code, with multiple print heads as visible or invisible markings apply the mail to identify counterfeits to be able to.

Thus in US 4,775,246 is an alphanumeric Number, in US 4,649,266 a single alphanumeric Number in a number additionally in the postmark also printed, with the comparison by the Postal officials of such digits or numbers subjective Errors are not excluded. In U.S. 4,934,846 (ALCATEL), on the other hand, is already becoming a machine-readable Barcode in a separate field next to the postage stamp printed, but what a disadvantage the available printing area for the postmark and / or the advertising cliché reduced.

Such a bar code using a separate Printers can be found in US Pat. No. 4,660,221 and US Pat U.S. 4,829,568, the latter being U.S. Patent also printed a character with offset elements whose offset is the relevant safety information contains. The evaluation takes place, for example in US 4,641,346 by such a sign read in columns and with saved characters column by column is compared to the security information to recover. The evaluation is accordingly complicated and only by means of complex Devices by the postal authority.

Since the representation of the bar or bar code is relative requires a lot of space is already a two-dimensional barcode has been proposed. However remains as a disadvantage that barcode only mechanically, i.e. cannot also be checked manually are. A security system known from US 4,949,381 uses imprints in the form of bitmaps in one separate marking field under the franking machine stamp printing. Although the bitmaps are particularly dense are packed by the still required Size of the marking field of the stamp image in its height reduced by the height of the check box. In order to goes too much of what is required for an advertising cliché Lose area. Another disadvantage is that required high-resolution detection device for Evaluation of the marking.

Another security system uses imprints in Form of a diagram (US 5 075 862) within the Franking machine stamp imprint. If pressure elements failed, the dots are missing in the printed image, which leads to signal an alleged forgery can. Such markings in diagram form within the Franking machine stamp imprints are therefore not so for sure. Even if the impression is correct, the machine evaluation is difficult because the whole Print image is to be evaluated.

Furthermore, DE 40 03 006 A1 describes a method for Labeling of postal items to enable identification been proposed by franking machines, including a multi-digit crypto number the date, the machine parameters, the postal value and of the advertising cliché and cached separately becomes. Via a printer media setting Printer control becomes the crypto number when printing additionally inserted in the print pattern. So can a counterfeit or any imitation using the crypto number of the franking machine stamp by an unpaid one Postage imprint can be recognized. Also at a large number of users of a single franking machine, the user can easily find out who manipulated the post value. However this is not a fully electronic one generated print image for an impact-less printer.

For security reasons alone DE 40 34 292 for a fully electronically generated print image been proposed only a constant part save the franking image in the franking machine and the other associated variable part of the To send the data center of the franking machine to the assemble final print image.

Everyone is responsible for the compilation of print data Franking a communication of the one franking module included terminal with a control center necessary. This will delay the pressure of what this solution for mass franking of large volumes of mail also unsuitable. The fully electronic generated advertising cliché belongs in this solution as well as the constant data of the franking image, such as the frame arrangement of the value and day stamp with Location and, if applicable, the postcode. The advertising slogan but can not partially in that franking machine be changed.

The aforementioned solutions are either to be achieved a high printing speed is too expensive or have multiple printers or are for one time-optimized composition of constant and variable data to form a pressure control signal unsuitable for a single printer.

On the one hand, all previous solutions allow in which can be edited, not a quick uninterrupted Change of an advertising cliché part, at a high printing speed of up to approx. 6000 letters per hour. On the other hand, each contains So far only the message with the Postal authority agreed information or if out multiple messages can be selected individually a selection of agreed information. Each Deviation either leads to the identification of a Counterfeiting or reduced counterfeit security, if such a deviation is allowed.

It was therefore the task of addressing the disadvantages of the prior art Technique to overcome a verification procedure to create a security imprint which of a franking device was generated on postal items.

The task is carried out with the characteristic features of the Claim 1 solved.

This is based on a franking device for which, on the one hand, a machine-readable as well as manually readable and decodable form of the identification, which can be visibly applied to the mail piece or the franking strip together with the franking imprint, and for which, on the other hand, a solution for combining constant and of quickly changeable editable data as well as for printing control for a column-wise printing of a franking image was developed.
As an additional function, the cliché should be changed via the actuating elements in the new franking machine, without this requiring prior approval from a data center or through the post office, and without this affecting the security of the billing and without such franking Postgut is sorted out as a forgery at the post office. At the same time, the security against counterfeiting should also be increased.

Distinguishing those manipulated with the intention of falsification of such unmanipulated but editable ones Franking machine imprints with cliché text part should continue to be easy with the postal authority to be possible. In addition, a reference to the Machine that has been mimicked by the manipulator or that was manipulated and reference to the machine, by the user beyond the inspection date was operated, given and / or from the impression be determinable.

Based on the consideration with a microprocessor and a printing module of a franking machine, is suggested for the security imprint at a fully electronically generated print image Marking data in one or more windows within a fixed through the franking machine print image the given frame when printing. For the time-critical generation of the marking data at least one after completing all entries Combination number formed from predetermined sizes and this to an encryption algorithm Encrypted crypto number, which then in one Marking is implemented. Here is at least one assigned to the higher digits of the combination number Number is a monotonically variable variable. This changes the mark with each print, what such a franked mail piece makes it unmistakable.

This marking is preferably in the form of a Barcodes and / or a series of symbols in one Field of the franking machine image at the same time this is printed by the only printer module. By the symbolism becomes mechanical as well a visual evaluation by a trained Examiner checking the shape and conceptual content of the symbols evaluates, made possible in the post office. The shape of the symbols, with orthogonal edges, made possible by an integral Measurement of the degree of blackening is a particularly simple one and fast machine readability. Opposite the bar code becomes a higher information density with the row of symbols reached and thus space in the franking machine print image saved or can be saved using the graphic Symbols more information can be printed coded.

An essential reason for that by the required Duration of time in the formation of the marker data printing speed is not required is reduced, but can be increased overall can, is in tapping into a time reserve during printing, by the microprocessor of the Control device that the columnar embedding of Performs window data.

For the procedure for the rapid creation of a security imprint for franking machines, which coded Marking data before a print request after Editing of window data and / or frame data of the Postage meter stamp image from the same microprocessor a control device that does the billing and Sequence control takes over, creates, is therefore provided that a print control signal after a print request is formed by converting it into binary pixel data converted marker data during the column by column Printing in the course of a special printing routine column by column into the currently printed column at a predetermined one Position.

The invention assumes that after switching on automatically the post value in the value print accordingly the last entry before the franking machine was switched off and the date in the day stamp corresponding to the current date can be specified for the reprint the variable data into the fixed data for the frame and for all related data that remain unchanged be electronically embedded. This variable data the window contents are briefly referred to as Window data and all fixed data for the value stamp, the daily stamp and the advertising slogan stamp as Framework data referred to. The framework data is one first memory area of a non-volatile working memory removable. The window data is one second memory area for the purpose of assembly can be seen from an overall representation of a franking image. According to the invention, the data from both Memory areas according to a freely selectable Assignment to a pixel print image before printing composed and into a column during printing of the entire franking machine print image has been completed. Those variable data, which during the Pressure embedded in the print column include at least the marking data. The time spent on the previous assembly of the entire pixel image with the rest of the data, is reduced accordingly.

The previous assembly is similar to that of Date in the postmark and as with the postage value in the value print, the variable information in the intended Windows added and modified afterwards can be. It is assumed that a Embedding a variable part of the text in a frame for an advertising cliché can be done in the same way, as with the other window data and that for that Window within the overall presentation of the advertising cliché is defined. To save time, be only the parts of a graphic representation of one Resaved change that actually changed become.

The procedure goes in preparation for a change of the cliché text part for franking machines assume that a loading of agreed cliché types via MODEM or Chipcard and a selection of a cliché type in on can be done in a known manner. According to the invention becomes an optional editing one in the franking machine stored cliché text part and a composition and the display of an overall presentation and if necessary, saving the edited text part additionally guaranteed before printing.

The arrangement for changing the cliché text part for franking machines shows according to the invention in a variant a pixel memory and a non-volatile memory with separate memory areas. Next the first memory area for the corresponding Framework data, the fixed data of the different Cliché types are assigned to a selection, the second storage area for window data, e.g. for a number of cliché parts that can be assigned, intended. The non-volatile memory is there with a facility that the data in this second Storage area automatically in a predetermined manner can change in connection.

In particular, a message is said to be in an agreed upon Window of a field for an advertising cliché in franking imprint are transmitted, with the message in Plain text addresses the addressee directly. The The embassy can be one not agreed with the post office be an alphanumeric part of the text, any one Information, e.g. Notes on company holidays, trade fairs, Contains meetings and / or public events.

So far, authorization has been granted to everyone required by the user Change required by the postal authority. The invention is therefore further based on the consideration with the post office an approval process for to agree on cliché types that can be supplemented by the customer, to in the franking machine using their keyboard the function for changing alphanumeric text parts within the advertising cliché. This eliminates the need for new advertising clichés every time from the franking machine manufacturer or dealer or to request its data center and thus the associated complex security procedure is also eliminated including the transmission of coded Signals for cliché data using a modem.

On the one hand, a change in the text part must not result in one reduced security against counterfeiting and on the other hand when checking the franking of mail, that with such a change of part of the cliché text provided, there is no automatic separation in the post office of the mail as supposedly falsified. For a security imprint, therefore appropriate marking including the fixed Postage meter pixel image data, which in a cliché text part editing remain unchanged.

Advantageously, for changing a Cliché text parts on already saved edited Parts of the text are used so that while the Printing a batch of mail without interrupting printing bring about the advertising cliché partially changed or adapted to current requirements can be.

According to the invention, it is proposed to use hexadecimal Framework data, window data and assignment data in the each separate memory areas of an additional transfer non-volatile memory and there to save the print image before printing to display and to edit the cliché parts can. It is then transferred to the volatile pixel memory and a classification of the Window data according to the assignment data in the Framework data. However, this is due to the invention possible to work time-optimized, so that the Printing speed becomes high.

Figur 1,

Blockschaltbild einer ersten Variante der erfindungsgemäßen Frankiermaschine,

Figur 2,

Ablaufplan für die Druckbilderstellung nach einer zweiten Variante der erfindungsgemäßen Frankiermaschine mit drei Pixelspeicherbereichen,

Figur 3a,

Darstellung eines Sicherheitsabdruckes mit einem Markierungsfeld

Figur 3b bis 3e,

Weitere Varianten der Anordnung von Markierungsfeldern für Sicherheitsabdruck

Figur 3f,

Darstellung eines Satzes an Symbolen für ein Markierungsfeld im Werbeklischee

Figur 4,

Sicherheitsabdruck-Auswerteeinrichtung,

Figur 5,

Ablaufplan nach einer dritten Variante der erfindungsgemäßen Frankiermaschine mit zwei Pixelspeicherbereichen,

Figur 6,

Ablaufplan nach einer vierten Variante der erfindungsgemäßen Frankiermaschine mit einem Pixelspeicherbereich,

Figur 7,

Postwertzeichenbild mit zugeordneten Druckspalten,

Figur 8,

Darstellung der auf ein Pixelspeicherbild bezogenen und davon getrennt gespeicherten Fensterkennwerte,

Figur 9a,

Decodierung der Steuercode, Dekomprimierung und Laden der festen Rahmendaten sowie Bildung und Speicherung der Fensterkennwerte,

Figur 9b,

Einbettung von dekomprimierten aktuellen Fensterdaten vom Typ 1 in die dekomprimierten Rahmendaten nach dem Start der Frankiermaschine bzw. nach dem Editieren von Rahmendaten,

Figur 9c,

Einbettung von dekomprimierten variablen Fensterdaten vom Typ 1 in die dekomprimierten Rahmendaten nach dem Editieren dieser Fensterdaten vom Typ 1,

Figur 10,

Bildung neuer codierter Fensterdaten vom Typ 2 für ein Markierungsbild,

Figur 11,

Decodierung von Steuercode und Umsetzung in dekomprimierte binäre Fensterdaten vom Typ 2,

Figur 12,

Druckroutine für das Zusammensetzen von Daten aus den Pixelspeicherbereichen I und II,

Figur 13,

Druckroutine für das Zusammensetzen aus einem Pixelspeicherbereich I und Arbeitsspeicherbereichen entnommenen Daten,

Advantageous developments of the invention are characterized in the subclaims or are shown in more detail below together with the description of the preferred embodiment of the invention with reference to the figures. Show it:

Figure 1,

Block diagram of a first variant of the franking machine according to the invention,

Figure 2,

Flow chart for the print image creation according to a second variant of the franking machine according to the invention with three pixel memory areas,

Figure 3a,

Representation of a security imprint with a check box

3b to 3e,

Further variants of the arrangement of marking fields for security imprint

Figure 3f,

Representation of a set of symbols for a marking field in the advertising cliché

Figure 4,

Safety imprint evaluation device,

Figure 5,

Flow chart according to a third variant of the franking machine according to the invention with two pixel memory areas,

Figure 6,

Flow chart according to a fourth variant of the franking machine according to the invention with a pixel memory area,

Figure 7,

Postage stamp image with assigned printing columns,

Figure 8,

Representation of the window characteristic values related to a pixel memory image and stored separately therefrom,

Figure 9a,

Decoding of the control code, decompression and loading of the fixed frame data as well as formation and storage of the window parameters,

Figure 9b,

Embedding of decompressed current window data of type 1 in the decompressed frame data after the start of the franking machine or after editing frame data,

Figure 9c,

Embedding decompressed variable window data of type 1 in the decompressed frame data after editing this window data of type 1,

Figure 10,

Formation of new coded window data of type 2 for a marking image,

Figure 11,

Decoding of control code and conversion into decompressed binary window data of type 2,

Figure 12,

Print routine for the compilation of data from the pixel memory areas I and II,

Figure 13,

Print routine for the compilation of data taken from a pixel memory area I and working memory areas,

1 shows a block diagram of the franking machine according to the invention with a printer module 1 for a fully electronically generated franking image, which contains an advertising slogan and / or a marking for a security imprint, with at least one input means 2 having actuating elements, and with a display unit 3, both of which have a An input / output control module 4 are coupled, a non-volatile memory 5 for at least the constant parts of the franking image and a control device 6. A character memory 9 supplies the necessary print data for the volatile working memory 7. The control device 6 has a microprocessor μ P, which with the input / output control module 4, with the character memory 9, with the volatile working memory 7 and with the non-volatile working memory 5, with a cost center memory 10, with a program memory 11, with a transport or feed device, possibly with a strip trigger 12, one Enc or (coding disk) 13 and a clock / date module 8 is connected.

The character memory 9 contains all alphanumeric characters or symbols are stored pixel by pixel as binary data. Data for alphanumeric characters or symbols are in the non-volatile memory 5 compressed in the form a hexadecimal number. According to the Position report delivered by encoder 13 via the Feeding the postal items or paper strips in relation the compressed data is sent to the printer module 1 the memory 5 read and with the help of the character memory 9 into a binary pixel data Print image converted, which decompressed in such Form stored in volatile memory 7 becomes. To explain the invention are below RAM 7a, 7b and pixel memory 7c used, although this is preferably physically preferred is a single memory chip.

The working memory 7b and the pixel memory 7c stand with the printer module 1 via a print register (DR) 15 and a printer controller having output logic 14 in connection. The pixel memory 7c is on the output side to a first input of the printer controller 14 switched, at the other control inputs output signals the microprocessor control device 6.

The arrangement for the rapid creation of a security imprint for franking machines, points in the non-volatile Main memory 5 has a first memory area A (e.g. for the data of the constant parts of the Franking picture etc. the advertising cliché frame, with a assigned index i identifies the respective frame), and a pixel storage area I in the volatile Pixel memory 7c. For a quick change of Window data, especially for a quick change of the cliché text part there is a second memory area B in the non-volatile memory 5 and a Pixel memory area II in the pixel memory 7c for the selected decompressed data of the variable parts of the franking image. A saved block of cliché text is still by an assigned name or indication j denotes.

The data for a first assignment of the names of the Cliché text parts for the names of the cliché frames are in a third memory area C of the non-volatile RAM 5 before. Through this assignment the data records in the memory areas A and B addressed and automatically called accordingly become.

The memory areas A to T in the non-volatile working memory 5 can contain a large number of sub-memory areas, under which the respective data are stored in data records. The sub-memory areas A _i are provided for i = 1 to m frame or fixed data, B _j for j = 1 to n window data and B _k for k = 1 to p window data, different assignments between the sub-memory areas of the different memory areas being selectable and / or are stored in a predetermined manner.

The strings of numbers (sTrings) which are entered for the generation of the input data with a keyboard 2 or via an electronic balance - not shown in FIG. 1 - connected to the input / output device 4 and calculating the postal value are automatically stored in the memory area T of the non-volatile memory 5 stored. This ensures that the last input values are retained even when the franking machine is switched off, so that after switching on the postage value in the value print is automatically specified in accordance with the last entry before the franking machine was switched off and the date in the day stamp in accordance with the current date. In addition, records of the sub memory areas, for example A _i , Bj, C etc., are also retained. In each data record of a sub memory area A _i , Bj or B _k control code and run length-coded frame or window data are alternately contained one after the other.

The corresponding temporary assignment of window to Frame data is switched on according to the current or the specified future date of the control device having a microprocessor 6 hit. Before printing, the non-volatile memory 5 the respective selected Framework data for the advertising slogan stamp, for the postmark and for the postage in the Register 100, 110, 120, ..., of a volatile RAM 7a taken over, during the Transfer tax code decoded and in a separate Memory area of the working memory 7b stored become. Likewise, the respective selected one Window data loaded in registers 200, 210, 220, .... The registers are preferably of sub memory areas in the memory area of the working memory 7a educated. In another variant, these are aforementioned register part of the microprocessor control 6.

The run-length encoded are decompressed hexadecimal data into corresponding binary pixel data transferred. The decompressed binary Pixel data that remains unchanged over a long period of time remain in a first pixel memory area I and the binary pixel data that changes frequently in adopted a second pixel memory area II. The Figure 1 shows a block diagram for such a first Variant of the solution according to the invention.

New frame and / or window data can be selected as long as after inserting and saving binary pixel data in the first pixel storage area I and the selection of editable window data with subsequent Decompress and save them as binary pixel data in the second pixel storage area II there is still no print request.

For example, a large number of identical letters should be included the same date and with the same Postage will be cleared, but in the same The moment the input is made, that one Cliché part can be replaced, which in the second pixel memory area II is loaded. Especially It is advantageous if the security markings in such a window in the postage stamp or in Day stamp or between two stamps become. Reloading the pixel memory area II with the decompressed window data that the selected ones in the memory areas of the working memory 5 compressed present correspond to present is done before printing. Assembling with the rest stored in the pixel storage area I. binary pixel data is preferably made available a print request during a print routine. For The selection of the cliché text part data now needs Pressure not to be interrupted. The invention thus enables fast uninterrupted Change of the advertising cliché part and the marking, up to a printing speed of approx. 6000 letters per hour, for example based on the 16 bit Processor technology.

The number of letters printed with each o.g. The advertising cliché is set in the Franking machine for later evaluation registered.

In a further training of this first variant, is - in a not shown in the figures Way - a variety of each separate Pixel storage areas for frame and for Window pixel data provided. The window data concern among others the current postage value (postage) and franking machine specific data (serial number) in Franking stamp, the date or additional suitable Data (absolute time or quantity) in the postmark, editable cliché text part data in the cliché stamp. Composing the frame and window pixel data takes place again - as with the first variant - during the execution of a special printing routine.

Figure 2 shows a second variant of the invention Solution. It can also be specially created encrypted and in a sixth memory area F stored marking data used for marking become. The arrangement for changing the cliché text part for Franking machines now have three separate ones in the pixel memory Storage areas. In addition to the first Storage area I for the data of the cliché type (Frame), the post value and the current date and the second memory area II for assignable multiple Cliché text part data becomes a third storage area III provided for the marking data. The Establishment that the data in this first, second and can change third memory area is the the same microprocessor of the control device 6, the also the billing routine and the printing routine executes. The data from the three memory areas are determined according to a predetermined (in certain limits freely selectable) assignment during the Print for an overall presentation of an advertising slogan composed.

In particular, in a modification of DE 40 03 006 A1 solution shown, a marking of mail based on a crypto number generated marker for Enabling the identification of franking machines can be made without difficulty if not including the multi-digit crypto number the data values of the data stored as a hexadecimal number entire clichés, but only with inclusion selected data values of the cliché frame and other data, such as the machine parameter of the value setting and the date formed and cached becomes.

It is assumed that not only numbers or Numerical values, such as the number of the used Advertising clichés, but data values of the image information used to form the encrypted information becomes. In contrast to DE-PS 40 03 006 can Formation of the crypto number any area of the Advertising clichés, which separate data, in one Data record are assigned. Out this data set will do this, individual data selected. It is advantageous that the Column end for each column to be printed as a control code is marked, which is coded to the run length hexadecimal data. It can preferably the first in the record run-length encoded hexadecimal data is used become.

In a development of the solution according to the invention by an existing and / or generated in the machine physical size, especially through the current Date, the associated data of the columnar regional Image information selected from the data set to at least a number of data (hexadecimal numbers) remove.

You can also add to any advertising cliché number several records can be assigned, each one Record those a portion of the Data related to advertising clichés. Doing so by an existing and / or generated in the machine physical quantity, the data record with the associated Data of the columnar regional image information selected to at least a number of data (Hexadecimal numbers).

Preferably, those of a predetermined one Print column corresponding to run length coded hexadecimal Data along with at least some of the Machine parameter data (serial number, monotonous changeable size, time data, inspection data, such as for example the number of prints in the last one Inspection) and the postage to a number in more specifically - in connection with FIG. 10 explained - combined and encrypted.

When creating new coded window data before it Storage in the third memory area III can for a high security standard, for example DES algorithm (Data Encryption Standard) for Encryption and also a conversion into one special graphic character set can be used.

However, other encryption methods are also available Methods to convert crypto number to one Suitable for marking.

A barcode is claimed in the franking machine print image depending on the amount of information encoded possibly considerable space or compels to Enlargement of the franking machine imprint or it cannot have all the information in the bar code imprint reproduced.

According to the invention a special graphic Symbols of existing particularly compact imprint related.

For example, one formed from symbols to be printed License plate can be in front, behind, under u./o. over one Field within the actual franking stamp imprint to be printed. This is it according to the invention to a human, as well machine-readable marking.

A letter envelope transported under the printer module 1 17 comes with a franking machine stamp image printed. The check box is located in an advantageous manner for an evaluation in one Line below the fields for the value stamp for which Daily stamp, for the advertising cliché and possibly in the field for the optional print addition of the franking machine stamp image.

From a representation shown in FIG. 3a of a first example of the security imprint can be seen that good readability for a manual Evaluation as well as machine readability with good Detection reliability is given.

The check box is in one within the franking machine print image under the Daily stamp arranged windows FE 6. Der den Post value in a first window FE 1, the Machine serial number in a second and third Windows containing FE 2 and FE 3 stamps if necessary, a reference field in a window FE 7 and one if applicable, the number of the advertising cliché in one Window FE 9 open. The reference field is used for pre-synchronization for reading the graphic string and to obtain a reference value for the Light / dark threshold in a machine evaluation. A pre-synchronization for reading the graphic String is also linked by and / or with the frame, in particular the postage stamp or Value stamp reached.

The fourth window FE 4 in the day stamp contains that current or entered in special cases predated date. Below this is an eighth window FE 8 for a compressed exact time, in particular for high-performance franking machines with tenths of a second. This ensures that no imprint other imprint is equal, thereby counterfeiting Copying the impression senseless with a copier becomes.

A fifth window FE 5 is in the advertising cliché for one editable advertising cliché text part provided.

FIG. 3b shows a security imprint with a checkbox in the columns between the value stamp and the day stamp can be seen, the upstream vertical part of the Pre-synchronization stamp and may serve as a reference field. This eliminates one separate window FE7. The marking data can be in this variant with a vertical arrangement of the Symbol series in a shorter time almost simultaneously be recorded.

It is also possible compared to that in FIG. 3a windows shown further windows for the open save unencrypted imprint. So that is on the other hand the print speed can be increased because fewer windows before printing in the frame data are to be embedded and thus the formation of Marker dates can start earlier. To achieve a simple copy protection is sufficient cryptized imprint using marking symbols, without an open, unencrypted print of the absolute Time in a window FE8. In the marking field FE 6 are the marking data, which is based on at least the Post value and such a time count generated are - as explained below with reference to FIG 10 becomes - already sufficient.

In a third - shown in Figure 3c Example of the security imprint is in addition to the variant shown in Figure 3b another Marking field in the postmark under the window FE 1 arranged for the postage value. More can be found here Information, for example about the number of the chosen advertising clichés, unencrypted but in one machine-readable form.

In FIG. 3d a fourth example of the security imprint, two more check boxes in the postmark below and above the window FE 1 for the Postage value arranged.

In FIG. 3e, in a fifth example for the security imprint, two more check boxes in the postmark below and above the window FE 1 for the Postage value arranged. The check box indicates which in the postmark above the window FE 1 for the Postage value is arranged on a barcode. In order to can provide further information, for example about the Number of the selected advertising cliché, unencrypted but communicated in a machine-readable form.

With a smaller number of available symbols Sentence, need more symbols for the same information to be printed. Then a row of symbols can either two lines or in the form of a combination of those in the Figures 3a to 3e shown variants take place.

The form of marking is free with any postal authority compatible. Every general change of the marking picture or the arrangement of the marking field easy because of the electronic printing principle possible.

The arrangement for the rapid generation of a security imprint for franking machines allows a fully electronically generated franking image, which was formed by the microprocessor-controlled printing process from fixed data and current data, to be set. For this purpose, a third memory area C is provided in the non-volatile working memory, in which data are available for a first assignment of the names of the variable parts to the names of the constant parts. In contrast, the data for the constant parts of the franking image, which relate to at least the frame of an advertising slogan, are stored in a first memory area A _i , an assigned name identifying the cliché frame, and the data for the variable parts of the franking image are in a second memory area B. _j or for marking data is stored in a memory area B _k , an assigned name identifying the variable part.

At predetermined intervals, for example regularly with every inspection of the franking machine also a change or replacement of - in the Figure 3f shown - made of symbols to further increase the security against counterfeiting.

3f shows a representation of a sentence Icons for a check box are shown, with the Symbols are suitably shaped so that both a mechanical as well as a visual evaluation made possible by trained staff in the postal authority becomes.

A sentence is added to increase the security against counterfeiting Used symbols that are not in the standard character set of common pressure equipment is included.

Compared to a barcode, a higher one Density of information when the symbols are printed saved. It is sufficient to choose between 10 Distinguish degrees of darkness, for example compared to the ZIP CODE one by a factor of three shorter length in the representation of the information to reach. So there are ten symbols, where the degree of blackening differs by 10% in each case. At a reduction to five symbols can be the Distinguish degree of darkness by 20%, however it is necessary, the number of symbols to be printed considerably to increase if the same information as with the symbol set shown in FIG. 3f, should be reproduced. Also a sentence with one a higher number of symbols is conceivable. Then shortened the row or rows of symbols correspond, however, the is also reduced accordingly Reliability of detection, so that then suitable evaluation devices digital image processing, for example those with edge detection, required are. Through continuous use of orthogonal edges and no rounding with simple algorithms of digital Image processing sufficient detection security reached. Use such detection systems for example, commercial CCD line cameras and Image processing programs supported by personal computers.

Another advantage over a bar code is in the through the symbolism of the image content conditional good readability of each other symbols in the selection field and the Possibility of the image content for a manual evaluation linguistically.

The check box is in the preferred variant at least under or in a field of the franking machine stamp image arranged and a line of such symbols below the franking stamp imprint and printed with it at the same time. By the Character store 9 becomes a conversion of a Crypto number in a symbolic marking performed. In particular, one is replaced by another physical size, advantageously by the Post value, selected list that the individual Maps crypto numbers to graphic symbols used. The encrypted hexadecimal data decompressed by means of the character memory to the from the symbols to be printed to press. This is also a too machine-readable marking.

The machine identification of the symbols in the The license plate can be made in two variants: a) via the integrally measured degree of darkness of each symbol or b) via edge detection for symbols.

Due to the quantized difference in density between the symbols becomes a simple machine Evaluation without complex pattern recognition possible. A reader is suitable for this purpose focused photo detectors arranged.

Even with different colored envelopes this simple machine evaluation is possible. To the Compensation of different measured values obtained, their Difference due to the different printing conditions or paper types, becomes a reference value derived from the reference field. The reference value is used for the evaluation of the degree of blackening. With this obtained reference value can be advantageous Way a relative insensitivity too against unusual printing elements, for example a thermal bar 16 can be achieved in the printer module 1.

The advantage of using a symbol set of the specified type Art is that depending on the requirement of respective national postal authority in a simple manner mechanically (by, for example, integral measurement of the Degree of blackening of the symbols) and / or manually Identification of an authentic franking stamp is made possible through the conceptual content of the symbols.

The one created for each serial number or user preferably in data center databases for all Franking machines saved existing lists contain data values for each variable Verification of the authenticity of a franking be used. On the one hand, the assignment of the Symbols for listed weights and on the other hand another - not shown in FIG. 3f - Set of symbols assigning meaning and Degree of blackening different for different users be determined.

A corresponding one - shown in FIG. 4 - Evaluation device 23 for manual identification has a computer 26 with a suitable program Memory 28, input and output devices 25 and 27 on. The one used by the respective postal authority Evaluation device 23 is provided with a - in FIG. 4 not shown - data center 21 in connection.

a) visuelles Erfassen der Seriennummer und deren Eingabe über eine Eingabeeinrichtung 25,

b) visuelles Erfassen des Postwertes und Eingabe über die Eingabeeinrichtung 25,

c) visuelles Erfassen der graphischen Symbole und Eingabe über eine entsprechend gekennzeichnete Funktionstasten aufweisende Eingabeeinrichtung 25,

d) Start einer automatischen Auswertung, ggf. in Zusammenwirken mit einem Datenzentrum 21 und Signalisierung des Vergleichsergebnisses oder Anzeige mindestens eines Teils der aus der Markierung zurückgewonnenen Größen zur manuellen Überprüfung durch einen Prüfer der Postbehörde.

A suitable procedure for checking security prints consists of the following steps:

a) visual detection of the serial number and its input via an input device 25,

b) visual detection of the postage value and input via the input device 25,

c) visual detection of the graphic symbols and input via an input device 25 having correspondingly labeled function keys,

d) Start of an automatic evaluation, possibly in cooperation with a data center 21 and signaling the comparison result or displaying at least some of the quantities recovered from the marking for manual checking by an inspector of the postal authority.

In a first evaluation variant, the Input device 25 by the trained examiner manually or automatically by means of a suitable reading device 24 the graphic symbols entered in order to the marking printed on the postal matter (letter) in convert back at least a first crypto number KRZ1. Here, the actuators, in particular Keyboard, the input device with the symbols to be marked for manual entry facilitate.

In a second step, the Franking machine stamp image removable openly printed Sizes, especially G0 for the serial number SN of the franking machine, G1 for the advertising cliché (frame) number WRN, G2 for the date DAT and G3 for the Post value PW, G4 for non-repeating time data TIME and at least one only from the franking machine manufacturer and / or the data center known and size G5 INS notified to the postal authority at least partially used to at least one To form comparison crypto number VKRZ1.

The review is carried out in a third step Comparison of the crypto numbers KRZ1 with VKRZ1 in the computer 26 the evaluation device 23, wherein a signal for Equality or non-justification with negative comparison result (inequality) is delivered.

A second evaluation variant consists of the printed mark to recover the individual information and with the open ones on the mail piece compare printed information. Were the Crypto numbers for marking after a symmetric Algorithm (for example DES algorithm) generated, so after the first step the first Evaluation variant from each crypto number Output number can be generated. The starting number is one Combination number KOZ and contains the number combination at least two sizes, one size by the upper digits of the combination number KOZ and the other size represented by the lower digits of the KOZ becomes. That part of the number combination, which is to be evaluated - for example, the post value - is separated and displayed. This eliminates the second and third step of the first evaluation variant.

One with a corresponding one is sufficient for the evaluation Program equipped device (laptop). Here you can possibly also from the franking machine stamp image non-removable sizes G1 and G4 if necessary and at least one only the franking machine manufacturer and / or the Data center known and notified to the postal authority Size G5 must be encrypted. These will also be recovered from the mark by decryption and can then be saved with the user-specific Sizes are compared. The in memory 28 saved lists can be connected via the data center 21 are updated. Closer Comments on this are made in connection with the - in shown in Figure 10 - step 45, formation new coded window data of "type 2" for a Marking picture made.

In a third evaluation variant, the evaluation device by the operator manually or automatically Sizes G0, G2, G3 and G4 entered to match the same key and encryption algorithm as it is used in the franking machine, a crypto number to derive. A mark created from it will displayed and by the operator with the on the mail (Envelope) printed marking compared. The comes the symbolism of the output unit 27 shown and printed on the mail Markings against.

If an uncomplicated (possibly simple asymmetrical) Encryption algorithm is used, for example one - not shown in the figures - purely mechanical stencil can be produced, the set accordingly, displays individual symbols. So are next to the frame number for the viewer recognizable advertising cliché frame used, the Serial number, the date from the postmark and the Post value from the franking stamp. A the resulting series of symbols is displayed and can start with the row shown in the marking field Symbols are compared. The review takes place by comparing the markings to eligibility Equality or the ineligibility for negative Determine comparison result (inequality).

The first size G1 is the advertising slogan frame number WRN, which the inspector recognizes from the franking stamp image. In addition to the user, this first size is also known to the franking machine manufacturer and / or data center and is communicated to the postal authority. In a variant, preferably with a data connection to the data center, the advertising slogan frames WR _n belonging to the serial number SN of the respective franking machine with assigned numbers WRN _n are displayed on a screen of the data output device 27. The comparison with the advertising slogan frame WR _b used on the letter is made by the examiner, who enters the number WRN _n determined in this way.

Those transferred from the data center to the memory 28 stored lists contain the one hand current allocation of the parts of the advertising slogan frame WRNT to a second size G2 (e.g. the Date DAT) and on the other hand the assignment of symbol lists to a third size G3 (e.g. the Post value PW). Additionally, a list of through the first size G1, especially the advertising cliché (frame) number WRN, selected parts SNT of the serial number SN to be available. User-specific information such as for example, the advertising slogan frame number WRN can be used for random manual evaluation of the marking can be used by decoding lists based on the user-specific information can be selected, the contain corresponding data records. With the size G2 (DAT) then becomes the byte from the data record determines what happens when generating the combination number is used.

In the preferred variant, on the one hand, for testing the uniqueness of the impression a monotony test used. The examiner takes the serial number SN the windows FE2 and FE3 of the impression and represents the Franker machine users fixed. This can additionally the ad cliché number will be used as it is in are assigned to certain cost centers as a rule, if the same machine from different Users. In the above Lists are data from last test also data from the last one Inspection entered. Such data are for example the number of pieces if the machine is over has an absolute piece count, or the absolute Time data if the machine has an absolute Counts.

In the first test step, the correctness of the printed postage value according to the valid Post office regulations checked. So that in subsequent fraudulent intent Manipulations on the imprint are found. in the second test step is then the monotony of the data, especially the one checked in window FE8. So that can Copies of a franking imprint are found. Manipulation for counterfeiting is therefore not promising, since this data in the form of a crypted row of symbols additionally in at least be marked in a checkbox.

With an absolute time or piece count, must when printed, the number specified in the FE8 window has increased since the last exam. In the window FE8, nine digits are shown, which is the representation a period of approximately 30 years with a resolution of seconds, allowed. Only after this time would the Counter overflowed. These can be removed from the marking Sizes can be recovered to keep them open Compare printed unencrypted sizes.

In a third optional test step you can then Other manipulations are suspected of manipulation, in particular the serial number SN of the franking machine, if necessary, the user's cost center is checked and be determined.

The information, such as the advertising slogan (frame) number WRN, on the other hand, can be through a predetermined window FE9 must be specified. The associated window data are type 1, i.e. they are changed less often than Window data of type 2, such as in the window FE8 the TIME and in window FE6 the marking data.

In a further embodiment variant, the data the windows FE8 and FE9 are not open unencrypted printed, but are only used for encryption used. That is why they are missing compared to FIG. 3a shown windows FE8 and FE9 in the - in the figures 3b to 3e shown - franking machine print images, to illustrate these variants.

In a preferred input variant for the test the temporarily variable sizes to be entered, for example the advertising cliché (frame) number WRN, the Date DAT, the post value PW, time data TIME and the Serial number SN automatically by means of a reader 24 each from the corresponding field of the franking machine stamp image detected and read. Here is the arrangement of the windows in the franking machine imprint to comply with in a predetermined manner.

Others assigned to the respective serial number SN Temporary variable sizes are only available to the franking machine manufacturer and / or data center known and will be communicated to the postal authority. For example, serves the one defined during the last inspection Number of frankings, as a fifth size G5.

All sizes to be entered, except for sizes G1, G4 and G5, must be evident from the individual windows FE _{j of} the franking machine stamp image. The size G5 forms, for example, the key for the encryption, which is changed at predetermined time intervals, ie after each inspection of the franking machine. These time intervals are dimensioned such that even when using modern analysis methods, for example differential cryptanalysis, it is certainly not possible to reconstruct the original information from the markings in the marking field in order to subsequently produce counterfeit stamp images.

For example, size G1 corresponds to an advertising cliché (frame) number. In the sub-memory areas T _i , T _{j of} the working memory 5 of the franking machine there are corresponding number strings (sTrings) for window or Frame input data saved.

The sizes G0, G2 and G3 correspond, for example, to the window data stored in the sub-memory areas T _{j of} the working memory 5 of the postage meter machine, the size G0 in the windows FE2 and FE3 from the sub-memory areas T ₂ and T ₃ , and the size G2 in the window FE4 from the Sub memory area T ₄ and the size G3 in window FE1 originate from sub memory area T ₁ .

a) Laden vereinbarter Klischeerahmen über MODEM oder Chipkarte,

b) Selektieren eines Klischeerahmens,

c) Editieren eines Klischeetextteils, das vor dem Frankieren automatisch abgespeichert wird,

d) Zusammensetzen und Anzeige einer Gesamtdarstellung des Frankierbildes,

The following steps are provided for changing the cliché text part for franking machines:

a) Loading agreed cliché frames via MODEM or chip card,

b) selecting a cliché frame,

c) editing of a cliché text part that is automatically saved before franking,

d) assembling and displaying an overall representation of the franking image,

If steps a) to c) have already been carried out beforehand saved cliché frames with the cliché text parts used immediately be displayed and selected to switch to Cliché or the combination of a cliché with the selected part of the cliché text without interrupting printing to effect.

It is furthermore provided that in the display unit 3 of the franking machine for the selection of a cliché frame, a number of names of the cliché frames or a clear representation for the selection of the cliché frames with an associated cliché or standard text part takes place from a pixel memory. By confirming the selection, at least one of the variable text parts for FE5 is assigned to the respective cliché frame. The selected cliché text part can be edited by means of the actuating elements while the plain text is shown on the display. After editing a cliché text part for the window FE5 and assembling and displaying an overall representation of a franking image, the edited text part is automatically saved before franking, with a new data record or a new assignment of the edited text part to the cliché frame in the memory areas B ₅ or C is saved.

The windows within the overall display of the advertising cliché are defined in such a way that only those parts of a graphic display that are actually changed are stored in a separate sub-storage area B _{5 in} the event of a change. The data of the window contents can be extracted from the storage area B for the purpose of composing them into an overall representation of a franking image. A run length coding of graphic data was provided in at least one area of the non-volatile working memory 5, the first code of each line of the coding indicating the number of pixels to be printed per column and control codes, for example for the start of windows of the respective windows (types 1 or 2), Column end, picture end in hexadecimal notation are present.

The cliché frame data and the data for the variable cliché text parts are taken from the memory areas A _i and B ₅ as required, the assignment being taken into account. A plurality of data records for the cliché text parts are preferably stored in the sub-memory areas B ₅ . At the start, the user enters his cost center, whereby a predetermined cliché frame data set is selected from the storage area A _i . Since the selectable cliché frames are each assigned to a cost center KST and / or there is a second assignment of the cliché type number to cost centers stored in a fourth memory area D, the predetermined arrangement of the print image data can be carried out by the control device 6.

It is envisaged that the names of the cliché frames stored in a first storage area A are composed of the number KN of the cost center K and a type number TN, that the names of the cliché text parts that are stored in a second sub-storage area B ₅ , by the at the time of Generation current date and possibly determined by the time UZ and that the data for the first assignment in the third memory area C by storing both the name of the cliché frame containing the cost center number KN and the type number TN, as well as the date DAT and possibly a name of the cliché text part containing a time UZ are determined. Depending on the selected cost center, an assignment is found in the memory area D and a predetermined data set for the cliché _{frame is} selected from A _i . The associated cliché text part can be addressed in the memory area B ₅ on the basis of the assignment given in the memory area C and then automatically transferred to the memory area 7 a of the volatile working memory 7 intended for this purpose.

It is also envisaged that for a cliché selection required display in the display unit 3 only from names of such cliché frames, for which assignments fall within a defined period exist in the third memory area C. A cliché frame without assigning a name to it a cliché part name cannot be displayed become. The assignment can e.g. on the period of the current year. After selecting the The corresponding cliché frame is named and an acknowledgment displayed in plain text.

The names of parts of the cliché text are displayed in the window provided for that field the display unit 3, in which also the clear representation of the cliché frame is visible.

For another variant of the illustration, it should be for better Selection of cliché parts immediately one after the other in one determined by the time data of the name Order of the clear representations of the parts of the cliché text in the window of the field of the display unit appear.

The defined period is in a preferred variant through the selectable time data in the data of the Allocation of cliché parts, especially those Time data such as the month and / or the year in relation to the current from a clock / date block 8 delivered date given automatically.

In a further advantageous embodiment of the inventive concept is an assignment in a fifth Given memory area E, which is a freely programmable defined period in which the time data in the data of the assignments of cliché parts to cliché frames with the current Date related.

In the sub-memory areas B ₅ B ₆ and B _{7 of} the working memory 5 of the franking machine, the stored window data for an advertising slogan text part, a marking field and possibly for a reference field are available. It should be noted that in some of the sub-memory areas of the main memory 5 of the postage meter machine identified as B _k , the window data are written and / or read out more often than in other sub-memory areas. If the non-volatile working memory is an EEPROM, a special storage method can be used to ensure that it remains safely below the limit number of storage cycles that is permissible for it. On the other hand, a battery-backed RAM can also be used for the non-volatile working memory 5.

The window data, which is less changeable in time hereinafter referred to as type 1 window data. In contrast, with window data of type 2 below referred to the constantly changing window data.

In FIG. 5 - compared to that in FIG. 2 shown second variant - now a third variant represented the solution according to the invention, which Procedure for the presence of - in Figure 1 - shown two pixel storage areas based.

According to the frequency of changing data, decoded binary frame and window data in two pixel memory areas saved before printing. The type 1 window data that is not to be changed continuously like date, serial number of the franking machine and that cliché text part selected for several prints before printing together with the framework data in Binary data decompressed and one in the pixel storage area I put together the stored pixel image become. In contrast, there are constantly changing window data of type 2 decompressed and as binary window data in the second pixel storage area II before printing saved. Window data of type 2 are too Printing postal and postage dependent postage value and / or the constantly changing marking. After a Print requests are made during a print routine during printing for each column of the printed image binary pixel data from the pixel memory areas I and II composed to a pressure column control signal.

After the start in step 40 takes place due to the Enter the cost center in step 41 an automatic Enter the last window currently saved and frame data and a corresponding one in step 42 Display. In the manner described above, a Cliché text part that corresponds to a certain advertising cliché assigned is automatically specified.

In step 43, frame data are stored in registers 100, 110, 120, ..., of the volatile working memory 7a and thereby detected control code and in volatile Main memory 7b saved. The rest of the framework data are decompressed and stored in volatile pixel memory 7c saved as binary pixel data. Likewise, the Window data in registers 200, 210, 220, ..., des volatile memory 7a loaded while doing so Control code detected and in volatile memory 7b saved and the remaining window data according to their Decompression accordingly in columns in the volatile Pixel memory 7c stored.

9a shows the decoding of the control code, Decompression and loading of the fixed frame data as well as the formation and storage of the window parameters and in Figure 9b the embedding of decompressed current window data of type 1 into the decompressed frame data after the start of the Postage meter or after editing Framework data shown in detail.

In step 44 there are either the decompressed ones Type I frame and window data as binary Pixel data stored in the Pichel storage area I before and can be processed in step 45 or there is a new entry of frame and / or Window data. In the latter case, step 51 branches.

In step 51, the microprocessor determines whether an input has been made via the input means 2 in order to Window data, for example for the post value to replace a new one or to replace window data, for example for a line of cliché text or edit. If such an entry has been made, the necessary sub-steps for the entries have been made, i.e. it will be a finished one another data set selected (cliché parts) and / or a new data record is generated which contains the data for the individual characters (digits and / or letters) of the Includes input size.

In step 53, corresponding data records for a Called up to check the input data and for the subsequent step 54 for reloading the Pixel storage area I with the window data of type 1 provided.

FIG. 9c shows step 54 for embedding decompressed variable window data of type 1 in the decompressed frame data after a new entry or after editing this type 1 window data detailed. The data from according to the Called records are evaluated to Control code for a "color change" or a Detect "column end", which for embedding of the newly entered window data are required. Then those data that do not have a tax code are decompressed into binary window pixel data and into embedded the pixel memory area I in columns.

On the other hand, it was determined in step 51 that none Window data should be selected or edited, the program then branches to step 55. In step 55 leads to the possibility of changing the used fixed advertising cliché or framework data on one Step 56 to enter the currently selected one Frame records along with the window records perform. Otherwise, step 44 branches.

If a new entry of selected special sizes a flag is set in step 44 and in the subsequent step 45 for formation of Data for a new series of marker symbols considered, if here for a second variant a step 45b is to be processed.

In step 45, the new encoded is formed Type 2 window data Marking data generated for a window FE6, where previous steps of encrypting data for Generation of a crypto number are included. In this step 45 is also a shape as Barcode and / or symbol chain provided. Based on Figure 10 is the formation of new in two variants Type 2 encoded window data for a marker image explained. In a first variant, in a step 45a a monotonically variable variable processed, so that ultimately by the printed Marking symbol row each imprint distinctive becomes. In a second variant, in one step 45b processed other sizes before step 45a.

The correspondingly formed data record for the marking data is then loaded into an area F and / or at least in a sub-memory area B _{6 of} the non-volatile working memory 5 and overwrites the previously saved data record for which window characteristic values have already been determined or are predetermined and are only now in the volatile working memory 7b are stored. The sub-storage area B ₁₀ is preferably provided for a data record which leads to the printing of a second row of marking symbols, as is shown in FIGS. 3c and 3d. In addition, double rows of symbols can also be printed side by side - in a manner not shown in FIG. 3b. The area F is preferably provided for a data record which leads to the printing of a bar code, as is shown in FIG. 3e.

In step 46, the data of the data set is transferred byte by byte for the marking in registers in the volatile working memory 7a and the control characters "color change" and "end of column" are detected, in order then to decode the remaining data of the data set and to decode the decoded binary window pixel data of the type 2 to load into the pixel memory area II of the volatile working memory 7c. FIG. 11 shows the decoding of control code and conversion into decompressed binary window data of type 2 in detail. Such type 2 window data are identified in particular by the index k and relate to the data for the window FE6, possibly FE10 for marking data and possibly FE8 for the TIME data of the absolute time count. The time data in particular represents a monotonously changeable, since the time-dependent, increasing size. First, BCD-packed time data supplied from the clock / date module 8 are, if appropriate, converted into a suitable data record containing time-length-coded hexadecimal data. Now they can also be stored in a memory area B ₈ for window data FE8 of type 2 and / or loaded immediately in step 46 into register 200 of the working memory 7a or into the print register 15 in columns.

In step 47 there is a print request to steps 48 and in the case of a print request not yet made in waiting for the print request. In one embodiment, the queue is - in the Figures 5 and 6 shown way - at the beginning of Step 47 returned directly. In another The embodiment is on hold - in one in the Figures 5 and 6 not shown ways - at the beginning of step 44 or 45.

The print routine - shown in detail in FIG. 12 - carried out in step 48 for the compilation of print column data from the pixel memory areas I and II takes place while the print register (DR) 15 is being loaded. The printer controller (DS) 14 effects this immediately after loading the Print register (DR) 15 a print of the loaded print column. It is then checked in step 50 whether all columns for a franking machine printed image are printed by comparing the current address Z with the stored end address Z _end . If the printing routine has been carried out for a piece of mail, a branch is made to step 57. Otherwise, the process branches back to step 48 in order to generate and print the next print column until the print routine has ended.

If the printing routine is ended, step 57 checked whether additional mail items are to be franked. Is that is the case, then in step 60 the franking completed. Otherwise, the end of printing is not yet reached and the program branches back to step 51.

FIG. 6 shows a fourth variant of the solution according to the invention, differing from that Block diagram according to Figure 1 only a pixel memory area I is used. In the Its pixel memory area I become decoded binary Frame data and window data of type 1 before printing assembled and saved. The steps are up to step 46, which is shown here in this variant is saved according to FIG. 6, and step 48, which is replaced here by step 49, identical. Up to step 46 results in Essentially the same sequence in the process.

13 shows the printing routine for composing from a pixel memory area I and Data taken from memory areas received.

The constantly changing window data of type 2 are in the Step 49 while printing each column decompressed and along with the columns printing binary pixel data from the pixel storage area I composed to a pressure column control signal. Window data of type 2 are, for example mail and transport-dependent to be printed Postage value and / or the constantly changing marking.

Using a postage stamp image shown in FIG. 7 and the data of the print control signal assigned to a print column, its generation from the frame and window data is explained. A letter envelope 17 is moved under the printing module 1 of an electronic franking machine at the speed v in the direction of the arrow and is thereby printed in columns s ₁ starting in a grid-like manner with the postage stamp image shown. The printer module 1 has, for example, a print bar 16 with a number of print elements d1 to d240. Ink-jet or a thermal transfer printing principle, for example the ETR printing principle (Electroresistive Thermal Transfer Ribbon), can be used for printing.

A column s _f to be printed has a printing pattern 30 to be printed, which consists of colored printing dots and non-colored printing dots. A colored printing dot is printed by a printing element. In contrast, the non-colored print dots are not printed. The first two printing dots in the printing column s _f are colored in order to print the frame 18 of the postage stamp image 30. Then 15 non-colored (ie not active) and 3 colored (ie active) printing dots alternate until a first window FE1 is reached, in which the postage value (postage) is to be inserted. This is followed by a range from 104 non-colored pressure dots to the end of the column. Such run length coding is implemented in the data set using hexadecimal numbers. The space requirement is minimized by having all the data in such a compressed form.

With hexadecimal data "QQ" 256 bits can be generated become. If you have the required Subtracted control code bits, less than 256 remain Bit for controlling the means generating dots.

However, if additional control characters "00" causing a color change are used, even more than 256 dots can be controlled, but more memory space is now required in the sub-memory area A _{i of} the main memory 5. The exemplary embodiments according to FIGS. 9, 11, 12 and 13 are designed for such a high-resolution printer module.

Control characters "00" are provided for color changes. This means that a subsequent hexadecimal number continues to be as evaluated in color (f: = 1), which is otherwise not colored would apply. A reset color flip-flop (f: = 0) is set at color change (f: = 1) and at the next one Color change switched again (f: = 0). With this In principle, 256 dots or more can be addressed become. The register 15 in the print controller 14 will loaded bit by bit from the pixel memory (e.g. for one Printing columns with N = 240 dots).

Other control characters are "FE" for column end, "FF" for the end of the picture, "F1" for the beginning of the first window Window FE1, etc.

In the following example chosen to explain FIG. 7, less memory space is required in the ROM compared to a print column to be controlled with more than 240 dots, since the control characters are placed favorably. For hexadecimal data "01", "02", ..., "QQ", ... "F0" are 1 to 240 dot ("F0" = [F * 16 ¹ ] + [0 * 16 ⁰ ] = [ 15 * 16] + [0 * 1] = 240) can be controlled.

Here the control code "00" for color changes theoretically omitted, since with a single Hexadecimal number "F0" an entire print column of 240 Dots with the same coloring completely can be defined. Nevertheless, with only imperceptible Additional memory requirement, with several windows in a color change may also make sense in a column.

According to this method, a data record for the pressure column s _f results in the form shown in sections:
... "2", "0D", "02", "4F", "F1", "68", "FE", ..., ...

When transferred to a register 100 of the μ P controller 6, control characters are detected from hexadecimal numbers “QQ” and evaluated in the course of a step 43.

In this evaluation, window characteristic values Z _j , T _j , Y _j or Z _k , T _k , Y _{k are also} generated and together with defined values for the start address Z ₀ , end address Z _end and the total run length R, ie the number of each printing column required binary data, stored in volatile memory RAM 7b.

A maximum of 13 windows could be called for the 13 control characters "F1" to "FD" and the start addresses determined. For example, with "F6" for the start of a window of type FE6 window FE6, a start address Z ₆ can be determined and saved as a window characteristic value.

FIG. 8 shows the window characteristic values relating to a pixel memory image and stored separately therefrom for a first window FE1. The window has a window column run length Y ₁ = 40 pixels and a number of columns of approx. 120, which is stored as window column variable T ₁ . If for this purpose the window start address Z ₁ is stored as the destination address, the position of the window FE1 in the binary pixel image can be reconstructed at any time.

Binary data converted from the registers 100, 200 are read bit by bit into the volatile pixel memory RAM 7c, an address being assigned to each bit. If the hexadecimal number loaded in the register is a detected control character "F2", the window characteristic value Z _{j is determined} for a start address of the window No. j = 2 with a total of n windows. This means that window data can later be inserted into the frame data at this point identified by the address. It is the window column run _length Y _j <R total run length of the print column. From the addition with R the new address can be created in the same row but in the next column.

FIG. 9a shows the decoding of the control code, decompression and loading of the fixed frame data as well as the formation and storage of the window characteristic values. A control code "color change" was taken into account when considering the creation of very high-resolution prints. A color flip-flop 1 must therefore be reset to f: = 0 in a first sub-step 4310. The source address H _i for finding the frame data is initially H _i : = H _i - 1 and the destination address Z: = Z ₀ .

For the window data of type 1, the window column variable T _j : = 0 is set in sub-step 4311, for j = 1 to n windows and for the window data of type 2, the window column variable T _k : = 0 for k = 1 to p windows. In sub-step 4312, the source address H _i for frame data is incremented and a color change is carried out so that the initial data byte is evaluated as colored, for example, which later leads to correspondingly activated printing elements.

The above-mentioned byte, which is a run-length-coded hexadecimal number for frame data, is now transferred in sub-step 4313 from the area A _{i of} the non-volatile memory 5, which is automatically selected by the cost center KST, into a register 100 of the volatile memory 7a. Control characters are detected and a run length variable X is reset to zero.

In sub-step 4314, a control character "00" for detected a color change, what after branching back on the sub-step 4312 leads to a color change, i.e. the next run length coded hexadecimal number an inactivation of the printing elements according to the Barrel length. Otherwise, in sub-step 4315 determines whether a control character "FF" for image end is present. If such is recognized, point d reached according to Figures 5 or 6 and the Step 43 processed.

Otherwise, if such a control character "FF" for end of image is not recognized in sub-step 4315, a check is made in sub-step 4316 as to whether there is a control character "FE" for an end of column. If one is recognized, the color flip-flop 1 is reset in sub-step 4319 and a branch is made to sub-step 4312, in order then to load the byte for the next printing column in sub-step 4313. If there is no end of column, it is determined in sub-step 4317 whether there is a control character for a window of type 2. If one has been recognized, then a branch is made to sub-step 4322. Otherwise, it is examined in sub-step 4318 whether there is a control character for type 1 windows. If this is the case, a point c _{1 is} reached at which a step 43b - shown in FIG. 9b - is carried out.

No control character for is in sub-step 4318 Window data of type 1 recognized, then lie in the called bytes the run length coded frame data which decodes in sub-step 4320 and into binary Frame pixel data implemented in the pixel storage area I of the pixel memory 7c at the set address Z get saved. In the following sub-step 4321 is the according to the number of bits converted Column run length variable X is determined and then the Destination address for the pixel memory area I around this Variable X increased. A point b is thus reached and to call a new byte, the Sub-step 4312 branches back.

In sub-step 4322, if there is a control character for window data of type 2, the storage of window characteristic values T _{k is carried out} . If a window characteristic, in this case the window column run variable T _{k is} still at the initial value zero, the window start address Z _k corresponding to the address Z is determined in a sub-step 4323 and stored in the volatile working memory 7b. Otherwise, a branch is made to a sub-step 4324. Sub-step 4323 is also followed by sub-step 4324, in which the window characteristic of the window column variable T _{k is} incremented. In the subsequent sub-step 4325, the previous window column variable T _k stored in the volatile main memory 7b is overwritten with the current value, and the point b is reached.

The window parameters are thus for k = 1 to p windows, in particular FE6 or FE10 or FE8 loaded. After that is branched back to sub-step 4312 to im Sub-step 4313 to load a new byte. The from the hexadecimal data converted bits (dot = 1) thus in step 43a shown in FIG. 9a byte into the pixel storage area I of the volatile Pixel memory 7c taken over and consecutively as Binary data saved.

FIG. 9b shows the embedding of decompressed current window data of type 1 in the decompressed frame data after the start of the franking machine or after editing frame data. Provided that a control character for windows of type 1 was recognized in sub-step 4318, point c ₁ and thus the beginning of step 43b are reached.

In step 4330, the storage of window parameters T _{j is carried out} . If a window characteristic, in this case the window column run variable T _{j is} still at the initial value zero, the window start address Z _j corresponding to the address Z is determined in a sub-step 4331 and stored in the volatile working memory 7b. Otherwise, a branch is made to a sub-step 4332. Sub-step 4331 is also followed by sub-step 4332, in which the window characteristic of the window column run length Y _j and the window column run length variable W _j to an initial value of zero, and the window source address U _j to the initial value U _oj -1 and the second color flip-flop for windows "do not print in color".

In the subsequent sub-step 4333, the previous window source address U _{j is} incremented and a color change is carried out, so that any window bytes that are loaded in the subsequent sub-step 4334 are evaluated as colored, which subsequently leads to activated printing elements during printing.

In sub-step 4334, a byte from the sub-memory areas B _j in the non-volatile main memory 5 is loaded into register 200 of the volatile main memory 7 a and is thereby detected for control characters.

In sub-step 4335, the window column run length Y _j is incremented by the value of the window column run length variable W _j . In sub-step 4336 it is determined whether there is a control character "00" for color changes. If one has been recognized, the process branches back to sub-step 4333. Otherwise, it is examined in sub-step 4337 whether there is a control character "FE" for the end of the column. If this is not the case, window data is available. In a sub-step 4338, the content of the register 200 is decoded with the help of the character memory 9 and the binary window pixel data corresponding to this byte is stored in the pixel memory area I of the pixel memory 7c.

The window column run length variable W _j is then determined in a sub-step 4339 to increment the address Z to the value of variable W _j. The new address is thus available for a new byte of the data record to be converted and the process branches back to sub-step 4333, in which the new source address for a byte of the data record is also generated for window FEj.

If a control character "FE" for a column end was recognized in sub-step 4337, a branch is made to sub-step 4340, in which the window column variable T _{j is} incremented and the volatile working memory 7b stored window column variable T _j and the window column run length Y _{j are} overwritten with the current value. A color change is then carried out in sub-step 4341 and point b has been reached.

This completes step 43b and new ones Framework data could be implemented in step 43a, if a next window is not recognized or the Point d has been reached.

FIG. 9c shows the embedding of decompressed variable window data of type 1 in the decompressed frame data after editing this window data of type 1. As has already been shown, pixel memory data and window characteristics have already been stored before the start of step 54.
The sub-step 5440 begins with the determination of the number n 'of windows for which the data has been changed and a determination of the associated window start address Z _j and window column variable T _j for each window FEj. A window counter variable q is also set to zero.

In sub-step 5441, it is determined whether the value of the window count variable q has already reached the value of the number of window changes n '. If there are zero changes, ie n '= 0, the comparison is positive and point d is reached. Otherwise, a branch is made to sub-step 5442, the window start address Z _j and the window column variable T _{j being taken} from the volatile working memory 6b for a first window FEj whose data has been changed. In addition, the source address U _{j is set} to an initial value U _oj -1, the target address Z _{j is used} to address the pixel memory area I, a window column counter P _j and the second color flip-flop are reset to the initial value zero.

In the following sub-step 5443, the source address is incremented and a color change is carried out before the sub-step 5444 is reached. In sub-step 5444, a byte of the changed data record is called up in the non-volatile memory and transferred to the register 200 of the volatile memory 7a, control characters being detected. If a control character "00" for color change is branched back to sub-step 5443 in sub-step 5445. Otherwise, branch to sub-step 5446 to look for control characters "FE" for the end of a column. However, if such a control character is not present, the content of the register 200 can be decoded in the subsequent sub-step 5447 with the cooperation of the character memory 9 and converted into binary pixel data for the window to be changed. These now replace the previous pixel data stored in area I of the pixel memory 7c from the point predetermined by the window start address Z _j . The bits converted in this process are counted as window run length variables W _j , with which the target address V _{j is} incremented in sub-step 5448. The process then branches back to sub-step 5443 in order to load the next byte in sub-step 5444.

However, if a control character "FE" for the end of the column is recognized in sub-step 5446, a branch is made to sub-step 5449, in which the window column counter P _{j is} incremented.

In sub-step 5450, it is examined whether the window column counter P _{j has reached} the window characteristic value for the associated window column variable T _j . Then, for a first changed window, all change data would be loaded into the pixel memory area I and the process branches back to the sub-step 5453 and from there to the sub-step 5441 in order to transfer change data into the pixel memory area I for a possibly second window. For this purpose, the window counter variable q is incremented in sub-step 5453 and the subsequent window start address Z _{j + 1} and the subsequent window column variable T _{j + 1 are} determined.

Otherwise, if the window column variable T _j has not yet been reached by the window column counter P _j in sub-step 5450, a branch is made back to sub-step 5443 via sub-steps 5451 and 5452 in order to overwrite a further window column in the pixel memory area until the old binary window pixel memory data is replaced by the new one have been completely replaced. For this purpose, the target address for the data in the pixel memory area I is incremented by the frame total column length R in sub-step 5451. The target address V _j is thus set to the next column for binary pixel data of the window in the pixel memory area I. In sub-step 5452, the color flip-flop is reset to zero, so that the conversion begins with pixel data that is rated as color. If no further new entry is determined in step 44, new coded window data of type 2 can now be formed in step 45 for a marking image, in particular according to a first variant with step 45a.

Step 45 comprises further sub-steps, shown in FIG. 10, for forming new coded window data of type 2 for a marking image.
While there is already decompressed binary pixel data in the pixel memory area I, after step 44 in step 45 the output data for the data records containing the compressed data for the windows FEj and possibly for the frame data are required again in order to generate new coded window data of type 2 for one To form a series of marking symbols. The individual output data (or input data) are stored in the memory areas T _w as a BCD-packed number in accordance with the respective sizes G _w . In addition to the data records stored non-volatile in the sub-memory areas A _i and B _j, the data for a data record for window FEk of type 2 are now compiled in several steps and stored non-volatile in a sub-memory area B _k .

a) Generierung einer Kombinationszahl KOZ1, wobei eine stetig monoton veränderbare Größe G4 zur Bildung von ersten zusammenhängenden Stellen und mindestens eine das Postgut charakterisierende weitere Größe G3 zur Bildung von zweiten zusammenhängenden Stellen der Kombinationszahl KOZ1 zur Verfügung gestellt werden,

b) Verschlüsselung der Kombinationszahl KOZ1 zu einer Kryptozahl KRZ1,

c) Umsetzen der Kryptozahl KRZ1 in mindestens eine Markierungssymbolreihe MSR1 anhand eines Satzes SSY1 an Symbolen.

The method for the rapid generation of a security imprint comprises, after provision of quantities, a sub-step 45a carried out by the microprocessor of the control device 6 of the franking machine before a print request (step 47), comprising the sub-steps:

a) generation of a combination number KOZ1, whereby a continuously monotonically variable variable G4 for forming first connected positions and at least one further quantity G3 characterizing the mail item are provided for forming second connected positions of the combination number KOZ1,

b) encryption of the combination number KOZ1 to form a crypto number KRZ1,

c) converting the crypto number KRZ1 into at least one marker symbol row MSR1 using a set of SSY1 symbols.

In a first variant 1, a row of marking symbols is generated in a step 45a. Due to the amount of information by the sizes G0 to G5, which are only to be partially printed in the franking machine stamp image in an unencrypted, open manner, at least some of the sizes are preferably used in the postage meter machine to form a single number combination (sub-step 451), which includes a single crypto number is encrypted (sub-step 452) and then converted into a marking to be printed on the postal matter (sub-step 453). The data record to be generated for the marking in a window FE6 can be stored in a final sub-step 454. Then point c _{3 is} reached. This first variant, executed in partial step 45a, can save the time that would otherwise be required in the franking machine for generating further crypto numbers.

It is envisaged that the constantly monotonically variable variable G _{W is} at least one ascending or descending machine parameter, in particular a time count or its complement during the life of the franking machine.

It is advantageous if a machine parameter is time-dependent, especially if he is the one decreasing battery voltage of the battery-backed Memory characterizing size G4a and a second steadily monotonously falling size G4b or the respective Complements of size G4a and G4b included.

It is also provided in a variant that the second steadily monotonically falling variable G4b the complement the number of pieces or a steadily monotonously falling time-dependent size.

In one variant, it is provided that the constantly monotonously decreasing size a numerical value according to the next inspection date (INS) and is a constantly monotonically falling time-dependent variable.

On the other hand, it is provided that a constantly monotonous ascending size the date or the last one Inspection determined number of pieces included.

As has already been explained in more detail, if to form third contiguous positions the combination number KOZ1 is a part of the user of the Franking machine characterizing size G0, G1 from the control device 6 is made available.

Preferably are provided in sub-step 451 from the memory areas T _{w is} the upper 10 digits of the combination number KOZ1 for the time data (size G4), and the lower 4 digits of the postal value (size G3). This results in a combination number with 14 digits, which would then have to be encrypted. When using the DES algorithm, a maximum of 8 bytes, ie 16 digits, can be encrypted at once. This means that the combination number KOZ1 can be supplemented by a further size in the direction of the least significant digits. For example, the supplementary part can be part of the serial number SN or the number WRN of the advertising slogan frame or the byte which is selected from the data record of the advertising slogan frame depending on a further size.

This combination number KOZ1 can be found in sub-step 452 approx. 210 ms encrypted in a crypto number KRZ1 be, here a number of others per se known steps. After that is in the sub-step 453 the crypto number KRZ1 based on a predetermined in the memory areas M of the non-volatile working memory 5 saved marking list in one to convert the corresponding row of symbols. This can especially the one that is so advantageous for later printing, increased information density can be achieved.

Even if a sentence shown in FIG. 3f with 10 symbols, i.e. without increasing the information density compared to the crypto number KRZ1 is used, but two rows of markings (side by side or one below the other) symbols could be printed are left with more information can be displayed unencrypted or encrypted could. It is then preferably a question of Information that doesn't change or hardly changes, and only once encrypted and converted into a series of symbols are needed. This is preferably the size G5, i.e. Inspection data (INS), for example the date of the last inspection or the rest the serial number SN or SN and the byte of the Record of the advertising slogan frame, which in the first combination number KOZ1 was not included, or selected predetermined parts thereof. In the figure 3c are in - here arranged orthogonally to one another - Windows FE6 and FE10 each have a row together 20 symbols shown, with which, for example a total of 8 bytes, i.e. 16 digit, the crypto number KRZ1 and further information, if necessary, unencrypted or on otherwise encrypted.

A second variant with an additional step 45b to step 45a differs from the first variant by others that have to be considered equally Output or input variables. In the second variant become one in two steps 45b and 45a Marker row of symbols generated, step 45b is carried out analogously to step 45a.

In a first sub-step 450 of the Control device 6 performed step 45 checked is whether a flag has been set to carry out of sub-steps 45b and / or 45a, that in substep 45b one at least the other Part of the characterizing the user of the franking machine Second combination number having sizes G0, G1 KOZ2 formed, then to a second crypto number KRZ2 encrypted and then in at least one second marker symbol row MSR2 based on a second SSY2 set of symbols is implemented.

In sub-step 455 is compared to sub-step 451 a combination number KOZ2 formed, in particular here the sizes for other parts of the serial number, for advertising cliché (frame) number, including Size can. In sub-step 456, as in sub-step 452 a crypto number KOZ2 is formed. In sub-step 457 then the transformation into a Marking symbol row, which in sub-step 458 is temporarily stored non-volatile.

Sub-step 45a, which comprises sub-steps 451 to 453, then takes place. If necessary, this can be connected by a sub-step 454. Then point c _{3 is} reached.

Here, despite twice using the DES algorithm, insofar as saving time because there is an evaluation in a first sub-step 450 takes place whether the selected, for the formation of the Marking symbol row required in substep 45b Sizes have been changed by an entry are. When entering new special Sizes, a flag would be set in step 44 and at a subsequent formation of data for a new one Marker symbol row to be considered here to complete step 45b. But is not that Case, then on previously educated and in a memory area 458 stored non-volatile present series of marking symbols or parts of the Marker symbol series can be used.

In one embodiment variant, a is entered in sub-step 456 different encryption algorithm than the DES for Time savings used.

In an advantageous embodiment variant is in Sub-step 453 of the first variant or in the sub-step 457 a transformation to the second variant additional increase in the information density of the Marking symbol row opposite the crypto number KRZ1 or KRZ2. For example, a 16 digit crypto number now a set of 22 symbols used to get the information using only 12 digit-in in the manner shown in FIG. 3b. For two crypto numbers, the row of marking symbols shown there is to double. That can be done using a the marking symbol row shown in FIG. 3b further row of marking symbols lying in parallel happen.

Accordingly, it can be shown that for a Marker symbols row of 14 digits only one 14 symbols symbol set is required. The already previously described check in the postal authority of such items of marking symbols can consequently - after the second evaluation variant - by inverse transformation of the row of marking symbols in crypto numbers KRZ1 possibly KRZ2, whose subsequent decoding to combination numbers KOZ1 if necessary KOZ2, whose individual sizes match those on the Postage in the franking picture of openly printed sizes be compared.

A series of marking symbols - as shown in FIG. 3a has been shown - is designed for 10 digits and can map a crypto number KRZ1 if the symbol set 40 symbols. Here is a fully automated one Input and evaluation - if only subjective errors of the To avoid the inspector from recognizing the symbols, sensible.

In a step following step 45 then the data of a record for that Marker symbol row after decompression in the remaining pixel data is embedded. Are for According to the invention, in particular, two different options intended. One possibility is based on the Figure 11 another with reference to Figure 13 in more detail explained.

FIG. 11 explains step 46 in FIG. 5 in particular. In a sub-step 4660, window parameters Z _k and T _{k are} specified for changed window data, the window change number p ′ is determined and a window count variable q is set to zero. In a sub-step 4661 it is evaluated whether the window count variable q is equal to the window change number p '. Then point d ₃ and thus the next step 47 would already have been reached. However, this path is not regularly followed at the beginning, since the monotonously increasing size constantly creates new marker symbol rows for each print.

Otherwise, if a change has been made, will be on branched to substep 4662 for window characteristics to enter according to the changed windows and To set initial conditions.

In a sub-step 4663, a new source address for the data of the data record of the window FEk just processed is generated in order to load a byte of the coded window data of type 2 from the memory area B _k into registers of the non-volatile memory 7 a and to detect control characters in the next sub-step 4664 .

In a sub-step 4665, the window column run length Y _k is then incremented by the window column run length variable W _k , which is still zero here. Then a check is carried out for control characters for color changes (sub-step 4666) and, if necessary, branching back to sub-step 4663 or a search for control characters for the end of the column (sub-step 4667). If successful, branch is made to sub-step 4669 and the window column counter P _{k is} increased. Otherwise, the next sub-step 4668 is to decode the control code and convert the called byte into decompressed binary window pixel data of type 2.

Sub-step 4670 then checks whether all of the window's columns have been processed. If this is the case, a branch is made to sub-step 4671 and the column run length Y _{k of} the window FEk is stored in memory 7b and branched back to sub-step 4673. If it is recognized in sub-step 4670 that all the columns have not yet been processed, the sub-step 4672 branches back to sub-step 4663, with the window characteristic value Y _k and the color flip-flop being reset to zero. In the next sub-step 4668, a decoding of the control code and a conversion of the called byte into decompressed binary window pixel data of type 2 must then be carried out again.

After sub-step 4673, where the characteristic values of the next changed window are called, a branch is made back to sub-step 4661. When all change windows have been processed, point d _{3 is} reached.

The printing routine shown in FIG. 12 for the Compose data from the pixel storage areas I and II expires if one in step 47 Print request is recognized and data in one - in of FIG. 5, not shown - sub-step 471 loaded have been.

In sub-step 471, the end address Z _{end is} loaded, the current address Z (run variable) to the value of the source address Z ₀ in area I of the pixel memory 7c, the window column counter P _k to the respective value corresponding to the stored window column variable T _k , the window bit count length X _k is set to the respective value corresponding to the stored window column run length Y _k and the target addresses Z _k for k = p windows and the total run length R for a print column s _{k are} loaded. The pressure column has N pressure elements.

Then, when point e _{1 is reached} at the beginning of step 48, several sub-steps take place. First, in a sub-step 481, the register 15 of the printer controller 14 is loaded serially bit by bit from the area I of the pixel memory 7c with binary print column data which are called up with the address Z, and the window counter h is set to a number which is the number of windows increased by one p corresponds. In sub-step 482 a window counter h is decremented, which outputs window numbers k one after the other, whereupon in sub-step 483 the address Z reached in the pixel memory is compared with the window start address Z _{k of} the window FE _k . If the comparison is positive and a window start address is reached, a branch is made to sub-step 489, which in turn consists of sub-steps 4891 to 4895. Otherwise, branch to sub-step 484.

In sub-step 4891, a first bit from the area II of the pixel memory 7c for the window FE _k, the binary window pixel data is loaded into the register 15, the address Z and the bit count variable 1 being incremented in sub-step 4892 and the window bit count length X _{k being} decremented. In a sub-step 4893, if not all bits corresponding to the window column run length Y _{k have been} loaded yet, further bits from area II are loaded. Otherwise, a branch is made to sub-step 4894, the window start address Z _k for addressing the next window column being increased accordingly by the total length R and the window column counter P _{k being} decremented. At the same time, the original window bit count length X _k is restored in accordance with the window column run length Y _k .

Sub-step 4895 then checks whether all window columns have been processed. If this is the case, then the start address Z _k for the corresponding window FE _{k is set} to zero or an address which lies outside the pixel memory area I. Otherwise and after sub-step 4896, a branch is made to point e ₁ .

In step 484 it is checked whether all window start addresses have been queried. Once that's done, then the program branches to sub-step 485 to determine the current Increment address Z. Hasn't that happened yet? the system branches back to sub-step 481 by which Continue decrementing window counter h until the next window start address is found or until in sub-step 484 the window counter h becomes zero.

In sub-step 486 it is checked whether all data for column s _k to be printed are loaded in register 15. If this is not yet the case, the bit count variable 1 is incremented in sub-step 488 to return to point e ₁ and then (in sub-step 481) to load the next bit addressed with the address Z from the pixel memory area into register 15.

However, if register 15 is full, the column is printed out in sub-step 487. Then, in a step 50 - already shown in FIG. 5 - it is determined whether all the pixel data of the pixel memory areas I and II have been printed out, that is to say the item of mail has been franked completely. If this is the case, then point f _{1 is} reached. Otherwise, a branch is made to sub-step 501 and the bit count variable 1 is reset to zero, in order to then branch back to point e ₁ . Now the next print column can be created.

The printing routine for the compilation of data taken from only one pixel memory area I and working memory areas is explained in more detail with reference to FIG. 13. After the pressure request, which is determined in step 47 shown in FIG. 6, a sub-step 471 takes place immediately, as already explained in connection with FIG. 12, in order to reach point e ₂ . Step 49, which is already beginning in FIG. 6, comprises the sub-steps 491 to 497 and the sub-steps 4990 to 4999. The sub-steps 491 to 497 run with the same result in the same order as the sub-steps 481 to 487 have already been explained in connection with FIG. Merely in sub-step 493, a branch is made to sub-step 4990 in order to reset a color flip-flop to g: = 0, whereupon the process of decompressing the coded window data of type 2 by column, which was explained in connection with FIG. 6, is initiated with sub-step 4991 becomes. Here there is a color change already explained - in connection with FIG. 7 - when evaluating the type 2 window pixel data to be converted, so that the first hexadecimal data of the called data set are, for example, evaluated as colored. The source address is incremented. The compressed window data for the type 2 windows FE _k , in particular for the marking data, are then loaded from the predetermined data record (stored in the corresponding sub-memory areas B _j ) into the registers 200 of the volatile main memory 7a in sub-step 4992. A hexadecimal number "QQ "corresponds to one byte.

The control code is also detected here. If a window column is to be printed which begins with non-colored, ie not to be printed, pixels, the control code "color change" would be in the first place in the data record. Thus, in sub-step 4993, there is a return to sub-step 4991 in order to carry out the color change. Otherwise, branch to sub-step 4994. In sub-step 4994, it is determined whether there is a "column end" control code. If this is not yet the case, the register content must be decoded and thus decompressed. For each run length-coded hexadecimal numerical value, there is a series of binary pixel data in the character memory (CSP) 9, which can be called up accordingly on the basis of the hexadecimal number loaded in the volatile working memory 7a. This is done in sub-step 4995, after which the decompressed window pixel data for a column of window type FE _j of type 2 are loaded serially into the print register 15 of the printer controller 14.

In sub-step 4996 the address is then incremented and a corresponding next hexadecimal number is selected in the data record, which is stored in the non-volatile main memory 5 in sub-area B ₅ , and the bits converted during decoding of the run-length coding are determined in order to form a window column run-length variable W _j , with which the destination address is incremented. The new destination address for reading is thus generated. and branching back to sub-step 4991.

If the end of the column has been reached, sub-steps 4997 to 4999 follow in order to then branch back to point e ₂ . The sub-steps 4998 and 4999 run similarly to the sub-steps 4895 and 4894 shown in FIG.

In sub-step 497, the fully loaded one is loaded Print column printed. Sub-steps 491 to 497 run similar to that - shown in Figure 12 - Sub-steps 481 to 487.

In addition to less mechanical effort high print speed with a variety in to embed a saved fixed print image variable print image data.

In particular, the advantageous variants are closer have been explained, but with a faster Hardware is quite possible, the order of the Modify procedural steps to include a security imprint to generate quickly.

Is in step 47 when a print request has been made to steps 48 and in the case of a print request not yet made in waiting in a queue for the print request, by - in the manner shown in FIGS. 5 and 6, respectively the beginning of step 47 is decreased directly, According to the invention, this has another temporal Advantage, because the DES algorithm is not constantly new is generated. The next recordable time after a generation of the marking symbol series can already trigger the pressure. Nevertheless, as mentioned, other branches are also possible.

Likewise, in another variant, step 45 be placed between steps 53 and 54. In that Step 45 following step 54 will then be the Data of a data set for the marking symbol series after decompression into the remaining pixel data of the pixel storage area I embedded. Another Pixel storage area is then not required.

Another opposite variant stores in Pixel storage area only the frame pixel data and embeds all window pixel data in the in the Print register 15 read corresponding columns without a pixel memory for Window data is needed.

In one variant, without the automatic editing of cliché text parts, the memory area A _{i can be} dispensed with. Instead, the unchangeable image information is stored in an ONLY read memory, for example in the program memory (ROM) 11. When the unchangeable image information is decoded, this ONLY read memory 11 is accessed, so that the intermediate storage can be omitted.

The invention is not based on the present embodiment limited.

Claims (6)

Procedure for checking security imprints on postal items, characterized by the steps: Entry and encryption of information printed on the mail piece, to a crypto number and Generate a mark from the crypto number, as well Comparison of the created with the printed marking. Method according to claim 1, characterized in that the information printed on a piece of mail is automatically entered into an evaluation device (23) with a suitable reading device (24). Method according to claims 1 to 2, characterized in that the information to be entered is temporarily variable sizes. Method according to claims 1 to 3, characterized in that the advertising slogan frame number (WRN), the date (DAT), the post value (PW), time data (TIME) and the serial number (SN) are automatically generated by the reader (24) the corresponding field of the franking image can be detected and read. Method according to claims 1 to 4, characterized in that a size is known to the franking machine manufacturer and / or data center and is communicated to the postal authority via a data connection. Method according to Claim 5, characterized in that the advertising slogan frames (WR _n ) associated with the serial number SN of the respective franking machine with assigned numbers (WRN _n ) are transmitted by data connection and displayed on a screen of the data output device (27) for a comparison with the slogan frame used on the letter WR _b .

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