EP1673736A1 - System zur prüfung von sicherheitsmerkmalen von wertdokumenten - Google Patents
System zur prüfung von sicherheitsmerkmalen von wertdokumentenInfo
- Publication number
- EP1673736A1 EP1673736A1 EP04765837A EP04765837A EP1673736A1 EP 1673736 A1 EP1673736 A1 EP 1673736A1 EP 04765837 A EP04765837 A EP 04765837A EP 04765837 A EP04765837 A EP 04765837A EP 1673736 A1 EP1673736 A1 EP 1673736A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- security
- different
- category
- sensors
- areas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000012360 testing method Methods 0.000 claims description 67
- 239000000126 substance Substances 0.000 claims description 41
- 230000003595 spectral effect Effects 0.000 claims description 25
- 238000005259 measurement Methods 0.000 claims description 21
- 238000011156 evaluation Methods 0.000 claims description 18
- 230000006978 adaptation Effects 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 10
- 238000013475 authorization Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012795 verification Methods 0.000 abstract 1
- 238000004020 luminiscence type Methods 0.000 description 9
- 238000001228 spectrum Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- OMOVVBIIQSXZSZ-UHFFFAOYSA-N [6-(4-acetyloxy-5,9a-dimethyl-2,7-dioxo-4,5a,6,9-tetrahydro-3h-pyrano[3,4-b]oxepin-5-yl)-5-formyloxy-3-(furan-3-yl)-3a-methyl-7-methylidene-1a,2,3,4,5,6-hexahydroindeno[1,7a-b]oxiren-4-yl] 2-hydroxy-3-methylpentanoate Chemical compound CC12C(OC(=O)C(O)C(C)CC)C(OC=O)C(C3(C)C(CC(=O)OC4(C)COC(=O)CC43)OC(C)=O)C(=C)C32OC3CC1C=1C=COC=1 OMOVVBIIQSXZSZ-UHFFFAOYSA-N 0.000 description 4
- 238000001748 luminescence spectrum Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
Definitions
- the invention relates to a system for checking security features of documents of value with at least one sensor in areas of different security categories.
- security features are understood to be feature substances which, for example, are inserted and / or applied in the value document in the form of pigments.
- An associated test system is known for example from WO 97/39428.
- This document teaches that a banknote should contain a high-security feature inserted or applied in paper, consisting of a mixture of two different substances, and a low-security feature consisting of a different substance.
- a high security area such as a bank
- the high security feature is checked, while in a low security area, such as only the low security feature is checked in publicly available vending machines.
- the invention is therefore based on the idea of carrying out the testing of the same security feature in different ways in areas with different security categories, on the basis of different sensor parameters for different security categories.
- the same substance can be used for all security categories, but only in different ways by users in areas different security categories can be checked.
- the procedure according to the invention is particularly suitable for testing the luminescence radiation of feature substances in or on banknotes.
- the different security categories can be determined, for example, by checking whether the sensor test according to the invention is to be used in a high-security area to which only specially authorized persons have access or in a low-security area, such as in a vending machine that is freely accessible for everyone.
- This different checking of the same security feature according to the invention in security areas of different security categories can in particular e.g. can be realized in that a property of the security feature is checked in areas with a lower security category as the basis of the check and only in areas with a higher security category the same property of the security feature is checked with higher accuracy and / or a different property than in areas with a lower one safety category.
- Different sensor parameters can be provided by using sensors with different measurement properties or sensors with the same measurement properties but different evaluation algorithms. frames are made available in accordance with the respective security category. In other words, either the sensor hardware and / or the sensor software can be selected differently.
- the principle according to the invention is illustrated by the particularly preferred example of testing the luminescent radiation of luminescent substances as a security feature in banknotes.
- the invention can also be used to check other documents of value, such as checks, chip cards, ID cards, passports or the like.
- the sensors of vending machines which are usually set up freely accessible for everyone without high security requirements, can check the luminescence radiation with lower accuracy, for example with lower spectral resolution, than sensors that the banks use to check the same - Which security features are made available.
- the measurement with different sensor parameters can also consist, for example, of measuring other properties of the luminescent radiation or testing in a different spectral range.
- the decay behavior of the luminescent radiation can also be measured, for example, and also measured differently and / or with different accuracy in areas with different security categories.
- a different number of decay times can be determined from the measured decay curve, depending on the security category, in order to be able to evaluate the measured curve with different accuracy.
- the envelope of the spectral profile of the security feature can be checked in the area with a low security category, while only in areas with a higher security category can the spectral profile be checked with a higher spectral resolution in order to substructure the envelope and thus more accurately To be able to determine details of the security features contained in the value document.
- Figure 1 is a schematic view of a test device for use in a system according to the invention according to a first embodiment
- FIG. 2 shows a schematic representation of the spectrum of a security feature of a bank note obtained with two different resolutions, on the basis of which the principle of the present invention is illustrated.
- FIG. 1 shows such a sorting device 1 in an exemplary manner.
- a sorting device 1 In a manner known per se, it has an input compartment 2, into which banknotes BN to be checked are stacked and, after being separated by a separator 3, along a transport path 4 in the transport direction T on a testing device 5 are transported past, on the basis of their test result the bank notes BN are optionally output by means of switches 6 in one of several storage compartments 7.
- the test device 5 serves among other things. for luminescence testing of im
- Banknote paper containing luminescent pigments and for this purpose comprises an illuminating device 8 for illuminating the banknotes BN to be checked, a spectrometer as sensor device 9 for detecting the luminescent radiation emanating from the illuminated banknote BN and an EDP-supported evaluation unit 10 for the signals detected by the sensor device 9 evaluate.
- the evaluation unit 10 does not necessarily have to be a separate component, but can also be a component of the sensor unit 9 itself or be mounted together with the sensor unit 9 in a common housing.
- test devices 5 with different sensor parameters are provided for testing the same security feature in different ways.
- test device 5 has the same property depending on the area of use or the associated safety category of the feature substance with greater accuracy or another property of the same feature substance.
- optical properties of the feature substance can be checked when used in a low-security area, while other optical properties and / or also other properties, such as e.g. magnetic properties of the feature substances can be checked.
- Figure 2 shows schematically the measurement curves of the luminescence spectrum of a feature substance obtained with two sensors 5 of different spectral resolution, i.e. the dependence of the measured radiation intensity I on the wavelength ⁇ of the luminescent radiation.
- the solid curve 15 shows the luminescence spectrum measured with a higher resolution and the dotted curve 16 shows the luminescence spectrum measured with a lower resolution.
- the feature substance to be tested is a mixture of two luminescent substances A and B.
- substance A has As an example, a main maximum for ⁇ Ai and a secondary maximum for substance B have only a single maximum at a wavelength ⁇ BI in the spectral range shown, which is only slightly spectrally distant from the maximum ⁇ AI of component A. In the range of the wavelengths ⁇ AI and ⁇ BI, the two substances A and B thus have a strongly overlapping spectrum.
- the above-described determination of the spectral course with different resolution can be accomplished, on the one hand, by providing spectrometers 9 for the different areas of use which have a different resolution, for example due to different constructed diffraction grating.
- the different sensor parameters are thus caused by a different design of the sensors 9 themselves.
- the sensors 9 available for the different areas of use can be constructed in the same way, e.g. also have the same diffraction grating, and that the different measurement accuracy consists only in a different evaluation of the measurement signals.
- This can e.g. mean that software-controlled in the evaluation unit 10 of the sensor 9 of a low security category, only the measured values according to the curve 16 of FIG. 2 are evaluated, while the software of the evaluation unit 10 of the sensor 9 of a higher security category evaluates the spectrum according to the graph 15 of FIG.
- the testing of luminescent substances as a security feature in banknotes BN can be carried out in different ways not only by measuring with different accuracy, e.g. with different spectral resolution depending on the security category, but additionally or alternatively also by measuring in other spectral ranges.
- test device 5 or the sensor 9 with a high safety category can measure in a wavelength range CI ⁇ H, which detect both the main maxima ⁇ AI, ⁇ BI and the spectrally spaced secondary maximum mA2 can.
- Test device 5 or sensor 9 of a low security category can only measure or evaluate in a smaller wavelength range CI ⁇ N, in which the secondary maximum of wavelength ⁇ A2 is not included.
- the checked value documents BN have the security feature in the form of a coding in order to be able to distinguish between different value documents, such as different denominations and / or series, ie different expenditure of a currency system.
- the sensors of the lower security category will only be able to check the existence or non-existence of one of the previously known codes, while only the sensors of the higher security category can detect the special type of coding. For example, in the case of FIG.
- the measurement can be carried out in different ways not only by measuring with different accuracy, e.g. with different spectral resolution or in different spectral ranges.
- a measurement and / or evaluation can take place in different areas of the banknote area.
- a sensor manufacturer can offer test devices 5 consisting of sensor 9 and evaluation unit 10, which can carry out the test intended for both the high security and the low security area.
- test devices 5 consisting of sensor 9 and evaluation unit 10, which can carry out the test intended for both the high security and the low security area.
- certain of the software functions can be activated or blocked for the different areas of use, so that, for example, the luminescence measurement with high resolution (Kurvel5) only in the high security category and only a lower resolution measurement in the lower security category (curve 16) can be carried out.
- test devices 5 with unlockable software functions can be checked, for example. This can be authorized, for example, by means of chip cards, biometric identification or entering a PIN.
- the test device can have an input unit 11 by means of which the respective user of the bank note sensor device 1 can use e.g. must authorize by means of biometric identification.
- a particular advantage of this variant is that it can be ensured that even if the device is stolen from a high-security area, to which only authorized persons have access, a test device 5 cannot be used in accordance with the functions that are usually enabled for the authorized user, if no corresponding authorization has been given.
- the bank node sorting device 1 or its test device 5 comprises a GPS (global positioning system) or other system 12 with which the position of the banknote sorting device can also be monitored remotely.
- device 1 or the test device 5 can be monitored at any time.
- the GPS system 12 will preferably be integrated in a housing of the test device 5 itself.
- This position monitoring by means of the GPS system 12 also has the advantage that an unauthorized misuse of the test device 5 can be recognized and reliably ensured that the corresponding tests can actually only be carried out in areas or by users of a high security category. If the GPS system e.g. is stolen without authorization from the usual installation location of the banknote sorting device 1, an alarm signal can be triggered and / or the corresponding test functions of the software of the sensor 5 in the evaluation unit 10 can already be automatically blocked by the evaluation unit 10 or the software itself can be released or otherwise gets destroyed.
- the test device 5 has a radio unit (not shown) which is in radio contact with a further radio unit which e.g. is firmly installed in the high-security area in which the banknote sorting device 1 is installed. If the radio connection between these two radio units is interrupted because the test device 5 is spatially removed from this radio circuit, for example, alarm signals can preferably also be generated or the corresponding software functions deactivated.
- test device deliberately outputs incorrect test results in order to prevent unauthorized use of the test device.
- a forgery adaptation of the sensor parameters of the test device 5 of a lower security category is carried out on the basis of the test results of the test devices 5 of a higher security category.
- measurement data from unaccepted value documents are preferably stored in the sensor 9 of higher security categories, forwarded to a central office which uses the data for counterfeit adaptation in order to modify the evaluation software of the sensors 9 of the lower security category in the evaluation unit 10 so that they contain a larger number of potential forgeries without having to check these sensors themselves with a higher measuring accuracy.
- the adaptation can also take place independently of a data transmission to a control center in the sensor itself.
- the counterfeit adaptation can be carried out by means of a chip card, flash card or other storage media which are used to exchange the software of the evaluation unit 10.
- the adaptation process can, however, also take place independently of a data transmission to a center in the test device 5 itself.
- test device 5 can have a so-called error counter which counts how often an attempt was made to deposit banknotes that had been checked and re-issued as unaccepted several times in succession.
- banknotes that are not accepted and thus possibly incorrect or suspected of being forged are frequently entered, after a certain number of such unsuccessful attempts the machine 1 or its checking device 5 can e.g. blocked for further test procedures and only released again after activation by an authorized body.
- banknotes used for adaptation are retained as suspected counterfeit in machine 1 and are not returned to the customer. This has the advantage that the counterfeiters and their counterfeiting methods can be identified better and earlier by the authorized bodies on the basis of the analysis of the incorrect adaption banknotes retained.
- an external observation device e.g. a camera can be activated or an already activated recording can be provided with additional information.
- the additional information can e.g. be stored in a log file so that the scene can be specifically examined.
- test devices 5 are used in which the sensors 9 for low-security and high-security categories are of the same construction and, depending on the security category, the different tests are carried out solely on the basis of different software algorithms, it can also be provided that the test device simultaneously tests the high and low safety categories can perform. This is advantageous, for example, if a forgery adaptation takes place in the test device 5 itself. It is conceivable, for example, that when the sensor is used in a low-security area, only the result of the low-security check is used and output as the result of the check, but the result of the high-security check obtained at the same time is used internally for adapting the software algorithms of the low-security category and / or to the central office is sent for further evaluation. "
- This method can also be used particularly advantageously in so-called recycling devices, that is to say in ATMs, in which a customer can both deposit banknotes as well as debit from the account and have them withdrawn in order to credit them to an account.
- banking devices in which banknotes deposited in previous transactions are paid out in subsequent transactions, it is particularly important that A rapid detection of the existence of new counterfeits or an adaptation of the evaluation algorithms adapted to the new counterfeits takes place, which are not recognized by the existing evaluation algorithms, since in such ATMs the acceptability of the banknotes is only based on the checking of the low security category.
- the data for the high security check and / or low security check for each checked banknote or only then to the central office, e.g. a central computer connected to several ATMs via data lines, or a body authorized by it, is sent for further evaluation if the test result of the high security test differs from the test result of the low security test for the same banknote and the banknote during the low security test, e.g. is recognized as genuine, while the high security check classifies the banknote as false.
- the sensors for carrying out the high-security check can also be integrated in a banknote processing machine in a local cash center, for example a bank or a shopping center.
- the sensors 5 of the different security categories measure, for example, with the same accuracy and in the same spectral range at the same location, but the different tests are carried out and / or supplemented by measuring further properties of the same security feature.
- a luminescence test can be combined with a magnetic test and only the sensor with a higher security category can carry out this magnetic measurement at all or with a higher accuracy than the sensor with a lower security category.
- the checking of the same security feature according to the invention in different ways in different areas of use can thus ensure that certain information about the security features of the value documents can only be checked and thus recognized in areas of a high security category.
- the present invention is of particular advantage when testing feature substances in banknotes and, in particular, their luminescence behavior.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10346635A DE10346635A1 (de) | 2003-10-08 | 2003-10-08 | System zur Prüfung von Sicherheitsmerkmalen von Wertdokumenten |
PCT/EP2004/011134 WO2005036480A1 (de) | 2003-10-08 | 2004-10-05 | System zur prüfung von sicherheitsmerkmalen von wertdokumenten |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1673736A1 true EP1673736A1 (de) | 2006-06-28 |
Family
ID=34428223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04765837A Ceased EP1673736A1 (de) | 2003-10-08 | 2004-10-05 | System zur prüfung von sicherheitsmerkmalen von wertdokumenten |
Country Status (5)
Country | Link |
---|---|
US (1) | US7487919B2 (de) |
EP (1) | EP1673736A1 (de) |
DE (1) | DE10346635A1 (de) |
MY (1) | MY146720A (de) |
WO (1) | WO2005036480A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7162035B1 (en) | 2000-05-24 | 2007-01-09 | Tracer Detection Technology Corp. | Authentication method and system |
DE10346636A1 (de) * | 2003-10-08 | 2005-05-12 | Giesecke & Devrient Gmbh | Vorrichtung und Verfahren zur Prüfung von Wertdokumenten |
DE10360859A1 (de) * | 2003-12-23 | 2005-07-21 | Giesecke & Devrient Gmbh | Banknotenbearbeitungsmaschine und Verfahren für das Erkennen von gefälschten Banknoten |
DE102004049998A1 (de) | 2004-10-14 | 2006-04-20 | Giesecke & Devrient Gmbh | Vorrichtung und Verfahren zur visuellen Darstellung von Meßwerten |
FR2895124B1 (fr) * | 2005-12-21 | 2008-02-08 | Banque De France | Procede de securisation de documents,machine et procede d'authentification associes. |
US8034398B2 (en) | 2006-02-16 | 2011-10-11 | Ncr Corporation | Secure tag coding |
CN101647046B (zh) * | 2007-03-29 | 2012-10-24 | 光荣株式会社 | 纸张识别装置和纸张处理装置以及纸张识别方法 |
US7995196B1 (en) | 2008-04-23 | 2011-08-09 | Tracer Detection Technology Corp. | Authentication method and system |
US8780206B2 (en) * | 2008-11-25 | 2014-07-15 | De La Rue North America Inc. | Sequenced illumination |
US8265346B2 (en) | 2008-11-25 | 2012-09-11 | De La Rue North America Inc. | Determining document fitness using sequenced illumination |
JP2010243363A (ja) * | 2009-04-07 | 2010-10-28 | Toshiba Corp | 蛍光検知装置 |
US8749767B2 (en) | 2009-09-02 | 2014-06-10 | De La Rue North America Inc. | Systems and methods for detecting tape on a document |
US8194237B2 (en) | 2009-10-15 | 2012-06-05 | Authentix, Inc. | Document sensor |
DE102011016509A1 (de) * | 2011-04-08 | 2012-10-11 | Giesecke & Devrient Gmbh | Verfahren zur Prüfung von Wertdokumenten |
US20130048874A1 (en) | 2011-08-31 | 2013-02-28 | Honeywell International Inc. | Articles with confounded emission characteristics and methods and apparatus for their authentication |
US9448171B2 (en) | 2012-06-27 | 2016-09-20 | Authenix, Inc. | Security aspects of multiexponential decays |
US9046486B2 (en) * | 2012-06-27 | 2015-06-02 | Authentix, Inc. | Security aspects of multiexponential decays |
US9053596B2 (en) | 2012-07-31 | 2015-06-09 | De La Rue North America Inc. | Systems and methods for spectral authentication of a feature of a document |
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US4146792A (en) * | 1973-04-30 | 1979-03-27 | G.A.O. Gesellschaft Fur Automation Und Organisation Mbh | Paper secured against forgery and device for checking the authenticity of such papers |
US5903340A (en) * | 1994-03-18 | 1999-05-11 | Brown University Research Foundation | Optically-based methods and apparatus for performing document authentication |
EP1244073A2 (de) * | 2001-03-16 | 2002-09-25 | BUNDESDRUCKEREI GmbH | Verfahren und Sensor für die Echtheitserkennung von Dokumenten |
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AT330574B (de) | 1972-05-03 | 1976-07-12 | Int Security Systems Sa | Falschungsgesichertes wertpapier |
US5790693A (en) * | 1990-02-05 | 1998-08-04 | Cummins-Allison Corp. | Currency discriminator and authenticator |
GB2284293B (en) * | 1993-11-30 | 1998-06-03 | Mars Inc | Article classifying method and apparatus |
GB2309778B (en) * | 1996-02-05 | 2000-05-24 | Mars Inc | Security document validation |
GB9607788D0 (en) * | 1996-04-15 | 1996-06-19 | De La Rue Thomas & Co Ltd | Document of value |
US6201662B1 (en) | 1998-09-25 | 2001-03-13 | Iomega Corporation | Latent illuminance discrimination marker with reflective layer for data storage cartridges |
US5974150A (en) * | 1997-09-30 | 1999-10-26 | Tracer Detection Technology Corp. | System and method for authentication of goods |
UA52804C2 (uk) * | 1997-12-02 | 2003-01-15 | Текнікал Графікс Сек'Юріті Продактс, Ллс | Магнітний/металевий захисний пристрій (варіанти), спосіб його виготовлення (варіанти), спосіб встановлення його автентичності і металевий захисний пристрій |
US6104036A (en) * | 1998-02-12 | 2000-08-15 | Global Payment Technologies | Apparatus and method for detecting a security feature in a currency note |
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US6813011B2 (en) * | 1999-12-10 | 2004-11-02 | Laser Lock Technologies, Inc. | Process for blending of ink used in counterfeit detection systems |
JP2001261999A (ja) * | 2000-03-17 | 2001-09-26 | Toshiba Corp | 真偽判定インク用磁性粉、その製造方法、それを用いた磁性インク、それを用いた真偽判定用印刷部材、その検出装置、及び真偽判定装置 |
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DE10029051A1 (de) * | 2000-06-13 | 2001-12-20 | Giesecke & Devrient Gmbh | Verfahren zur Echtheitsprüfung von Dokumenten |
FR2813134B1 (fr) | 2000-08-21 | 2004-01-16 | Banque De France | Procede d'authentification de documents sensibles |
US6686074B2 (en) * | 2001-03-16 | 2004-02-03 | Bundesdruckerei Gmbh | Secured documents identified with anti-stokes fluorescent compositions |
DE10154342A1 (de) * | 2001-11-06 | 2003-05-22 | Giesecke & Devrient Gmbh | Bedienung von Banknoten-Bearbeitungsanlagen |
DE10160578A1 (de) * | 2001-12-10 | 2004-02-12 | Giesecke & Devrient Gmbh | Verfahren und Vorrichtung für die Überprüfung der Echtheit von Blattgut |
US7256874B2 (en) * | 2002-10-18 | 2007-08-14 | Cummins-Allison Corp. | Multi-wavelength currency authentication system and method |
-
2003
- 2003-10-08 DE DE10346635A patent/DE10346635A1/de not_active Ceased
-
2004
- 2004-10-05 EP EP04765837A patent/EP1673736A1/de not_active Ceased
- 2004-10-05 US US10/574,661 patent/US7487919B2/en active Active
- 2004-10-05 WO PCT/EP2004/011134 patent/WO2005036480A1/de active Application Filing
- 2004-10-07 MY MYPI20044110A patent/MY146720A/en unknown
Patent Citations (3)
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US4146792A (en) * | 1973-04-30 | 1979-03-27 | G.A.O. Gesellschaft Fur Automation Und Organisation Mbh | Paper secured against forgery and device for checking the authenticity of such papers |
US5903340A (en) * | 1994-03-18 | 1999-05-11 | Brown University Research Foundation | Optically-based methods and apparatus for performing document authentication |
EP1244073A2 (de) * | 2001-03-16 | 2002-09-25 | BUNDESDRUCKEREI GmbH | Verfahren und Sensor für die Echtheitserkennung von Dokumenten |
Non-Patent Citations (1)
Title |
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See also references of WO2005036480A1 * |
Also Published As
Publication number | Publication date |
---|---|
MY146720A (en) | 2012-09-14 |
US7487919B2 (en) | 2009-02-10 |
US20070095891A1 (en) | 2007-05-03 |
DE10346635A1 (de) | 2005-05-12 |
WO2005036480A1 (de) | 2005-04-21 |
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