WO2006111293A1

WO2006111293A1 - Data carrier, particularly an optical data carrier such as a cd, dvd and a similar storage medium, with an ability to render it unusable

Info

Publication number: WO2006111293A1
Application number: PCT/EP2006/003279
Authority: WO
Inventors: Markus Schedler
Original assignee: Markus Schedler
Priority date: 2005-04-22
Filing date: 2006-04-10
Publication date: 2006-10-26
Also published as: DE102005028520A1

Abstract

The invention relates to a data carrier, particularly an optical data carrier such as a CD, DVD or the like. The data carrier is characterized by having a data carrier layer, which can be removed from the carrier disc. An information field is provided, which is concealed when the data carrier layer has not been removed and which is exposed only when a data carrier layer has been removed. For example, a film-like detachable field is provided that is adhered to the non-scannable rear side of the data carrier layer, the information field being enclosed between the rear side of the data carrier layer and the detachable field. The method for the time-limited use of a data carrier of this type is characterized by the following steps: distributing the data carrier with an intact and non-removed data carrier layer by a rental location to a user; using the data carrier during any time interval; subsequently removing and destroying the data carrier layer in conjunction with exposing the information field, and; conveying the deactivation code, which can be read from the exposed information field, to the rental location.

Description

Data carrier, in particular optical data carrier, such as CD, DVD and the like storage medium, with a Entwertungsmöglichkeit

description

The invention relates to a data carrier, in particular an optical data carrier, such as a CD and a DVD and the like storage medium, with a debasing option according to the preamble of claim 1.

Data carriers, in particular optical data carriers, such as CD and DVD, currently play a decisive role in the storage of audiovisual or software data. Such data carriers are used both for the distribution and storage of audio and video products, as well as for the distribution of software.

Depending on the respective distribution channel, such data carriers are sold, but also lent or temporarily handed over to a user. As an example in this context video libraries are called, in which an extensive inventory of DVDs is available, being borrowed from the stock DVDs by a number of users and brought back after a certain time. A comparable approach is followed in the distribution and use of software, which has a limited validity and after a certain period either dysfunctional or offers the user a way to purchase a full version.

There are a number of problems and disadvantages associated with the rental of such media in video or audio libraries. For example, the person borrowing a DVD is obliged to return the DVD to the video store after a certain period of time. Otherwise, additional lending fees must be paid if the rental period is exceeded. Timely return of the DVD, however, may not be possible for a number of reasons or simply too uncomfortable for the borrower. For example, when watching a movie stored on a rented DVD, the borrower may have made himself comfortable in the evening and, after watching the movie, does not necessarily bother to go to the video store to bring the DVD back on time. In this case, of course, he has an increased Rental fee, which is imposed on him as a penalty for exceeding the rental period.

Furthermore, the existing in the video library DVDs naturally go through several hands and are borrowed and used by many borrowers. The packaging is increasingly tapped and damaged, which is often the DVD damage. It is therefore very common in practice that DVDs are borrowed, the borrower at home to his annoyance must find that the DVD is damaged. The television evening is naturally spoiled and the disputes with the lender about the cause of the damage on the DVD do the rest. It is therefore understandable that these deficiencies must be remedied.

As a means against unintentional or deliberate exceeding of the loan period or theft of a DVD from the inventory of a video store, or a CD from an audio library, there are embodiments of such data carriers, which become useless after a set period of time. As an example, reference is made in this context to the teaching of the documents WO 00/56529 and US 6,338,933.

According to the teaching of these documents, the reflectivity of the data carrier layer is irreversibly eliminated after a certain period of time by a special design of the optical data carrier in this case. This is achieved by first storing the data carrier in an airtight packaging, whereby after the occurrence of the air contact, ie when using the CD or the DVD, within a certain time (usually after 48 hours) the reflective data carrier layer resp ., The disk itself discolored so that a laser scanning impossible and the disk is thus useless. Such a designed disk provides reliable protection against theft in the rental and can also be used only once, however, the associated production costs are relatively high, so that its widespread use is not profitable. In addition, the unchangeable limited service life of the optical data carrier prevents flexible design of the data carrier rental, in particular the rental periods. It is practically impossible for such a data carrier, depending on the supply and demand scheduling periods in each case to plan or change at short notice. Furthermore, a number of embodiments of optical data carriers and methods are known with which the data carrier can be made unusable. Thus, for example, WO 01/35195 A1 describes an optical storage medium in which the optical layer of the storage medium is at least locally decomposed by the action of a chemical agent, rendering the data carrier unusable. Such a data carrier is also expensive and requires an equally elaborate packaging, so that the self-destructive mechanism is not accidentally triggered.

It is therefore the object underlying the invention to provide a simple and therefore cost-effective embodiment of a data carrier, in particular an optical, readable on both sides data carrier, such as a CD or DVD, in which the disk for a basically arbitrary and freely selectable time can be made unusable, and its properties are optimized especially in terms of the aforementioned loaned use of the disk.

The object is achieved with a data carrier having the features of claim 1, wherein the following subclaims contain expedient or advantageous extensions and embodiments of the main claim.

According to the invention, the data carrier is characterized by a debossing option in the form of a removable data carrier layer which can be detached from a carrier body, in particular a carrier disk, whereby an information field hidden in an unresolved data carrier layer and exposed in a detached data carrier layer is provided.

The data carrier thus has both a means to eliminate its usefulness at least temporarily and at the same time contains a means by which the usability is clearly confirmed. The elimination of the usability of the disk is done by the detachment of the disk layer. The information field uncovered in connection with this unambiguously confirms this at least temporary destruction process. Conveniently, in the case of the exposed information field, the detached data carrier layer is irretrievably destroyed. This completely excludes further use of the data carrier.

The deactivation code expediently contains a deactivation code with which the usability of the respective data carrier is correctly and unambiguously identified. The deactivation code forms a clear and easily to be recorded or managed information about the deactivation of the data carrier.

In an advantageous development, data that can be activated by an enabling code are stored in the data carrier layer. By this embodiment, optical data carriers with predominantly software-like data both in the physical level of the data carrier itself, as well as at the level of the stored software in their use can be made controllable, with a beginning and an end of the data usage are clearly defined in time.

Conveniently, in one embodiment, the data carrier is designed such that a glued-on film-like peel-off field is provided on its non-scannable back, wherein the information field is enclosed between the back of the data carrier layer and the peel-off field.

This means that in the intact state, the information field between the data carrier layer and the peel-off field is hidden and can not be read. In order to read the information field, the peel-off field must be removed from the optical disk. Because the peel-off and the disk layer are glued together, therefore, the disk layer is also at least partially deducted and made the optical disk as a whole completely unusable.

The non-scannable back of the data carrier is formed in one embodiment in the form of a detachable from the carrier disk film body. In addition, the non-scannable back may include a machine-readable identification code, particularly in the form of a bar code, a magnetic stripe, an RFID chip, or the like encoding means. The disk thus has an open and easy by technical means readable identifier that is independent of the (initially unreadable) deactivation code.

The data carrier layer itself can be designed in various ways. In a first embodiment, the data carrier layer is an optical storage layer. The data carrier is in this case an optically readable and / or writable storage medium, in particular a conventional CD, CDROM or DVD or a storage medium comparable thereto.

In a further embodiment, the data carrier layer is a magnetic storage layer. The data carrier in this case is a magnetically scanned storage medium, e.g. a floppy disk or a hard disk.

Finally, the data carrier layer can also be a magneto-optical storage layer. The data carrier in this case is a so-called MO storage medium, for example a so-called mini disk.

The carrier body may also be a carrier tape in a specific embodiment. The data carrier in this case is a storage medium for a tape recording, for example a magnetic tape in a video or audio cassette and the like recording means or an optically or magneto-optically writable or readable storage tape.

A method for the temporary use of an optical data carrier of the aforementioned type is characterized by the following method steps:

First, the above-described optical data carrier having an intact and unreleased volume layer is output by a rental station. The optical disk can then be used indefinitely. After any period of time, the volume layer is detached and the information field is uncovered. The deactivation code which can be read on the information field is transmitted to the rental agency and there clearly identifies the data carrier as unusable and thus deactivated. This means, in particular, that the data carrier does not have to be returned to the rental office. It is perfectly sufficient to prove the deactivation of the data medium in a credible manner to the rental agency by specifying the deactivation code. At the same time, the time of deactivation is precisely defined and the rental period uniquely determined, because the use of the data carrier inevitably ends with the exposure of the information field. The rental agency has in the form of the transmitted deactivation code thus a clear means of control over the rental period of the loaned disk.

In an advantageous embodiment of the method, which can be used in particular for data CDROM, the data stored on the data carrier layer is activated by an enabling code. In conjunction with this, an activation time is saved. After transmitting the deactivation code, which according to the previous embodiments is known by the exposure of the information field, a deactivation time is stored. Subsequently, a time difference between the activation time and the deactivation time is determined and stored.

With such an advantageous embodiment of the method, it is possible, in particular, to safely and simply control the useful life of a software distributed on the data carrier, whereby further use of the stored software after transmission of the deactivation code is physically precluded by the de facto destruction of the data carrier.

The optical data carrier and the method for temporary use of the optical data carrier will be explained in more detail below with reference to exemplary embodiments in conjunction with FIGS. 1 to 9. The same reference numbers are used for identical or equivalent parts.

It shows:

1 is a sectional view of an exemplary optical disc with hidden information field, 2 shows a sectional view of the optical data carrier from FIG. 1 with an exposed information field and a destroyed data carrier layer, FIG.

3 shows an exemplary information field with a deactivation code,

4 shows an exemplary perspective view of the optical data carrier with hidden information field,

5 shows an exemplary perspective view of the data carrier from FIG. 4 with the information field exposed in the deactivated state.

6 shows another exemplary embodiment of a data carrier with a removable film body,

7 shows an illustration of the data carrier shown in FIG. 6 with the foil body detached and the deactivation code exposed.

• Fig. 8 shows an exemplary representation of a blue-ray disc in a ready-to-use state,

FIG. 9 shows the blue-ray disc shown in FIG. 8 exposing the information field. FIG.

1 shows an exemplary optical data carrier in section. In this embodiment, the data carrier consists of a transparent to the scanning laser radiation carrier body 5, which is in particular a well-known from the prior art transparent plastic disc in a prior art embodiment, and applied to the back of the carrier body data carrier layer 10. This contains the of the laser beam scanned data tracks. According to the preceding embodiments, the data carrier layer may also be a magnetic layer or a magneto-optical layer.

Depending on the embodiment of the data carrier, the back of the data carrier layer is provided with a matt protective layer or a lamination 6, which protects the back of the data carrier layer from damaging influences or serves to label the data carrier. The Lamination is usually made of a film-like plastic or paper material that can be printed in particular and serves as a label of the data carrier. Furthermore, the lamination can also be designed in the form of a plastic disk.

In the embodiment shown in FIG. 1, an information field 15 is placed on the back of the data carrier layer covered with either the matt protective layer or the lamination 6. The back of the lamination or the information field is covered with a peel-off 25, wherein the peel-off is firmly bonded at least to the back of the lamination. The information field 15 does not necessarily have to be firmly connected to the lamination. It can easily rest on the back of the disk and is sandwiched between the peel-off pad and the liner.

In the state shown in FIG. 1, the information field 15 is neither through the peel-off field 25 nor through the carrier body 5 or the data carrier layer

10 visible or readable. To expose the information layer 15, the peel-off pad 25 is removed from the back of the data carrier layer as shown in FIG. Due to the solid adhesive bond between the peel-off and the back of the data carrier, the lining 6 is torn open and, in connection therewith, irreversibly destroys the data carrier layer. Remains remain

11 of the lamination 6 or the data carrier layer 10 on the carrier body 5 or the peel-off field 25 adhere. The information field 15 sticks to the underside of the peel-off field 25, but is not covered by the material of the lamination or the data carrier layer and is thus exposed. The information given on the information field 15 can now be read and the optical data carrier is certainly useless.

3 shows an exemplary information field 15, in particular an exemplary deactivation code 20 printed on the information field. According to the preceding descriptions, the deactivation code can only be recognized on the uncovered information field. Its readability thus clearly refers to the fact that the data medium is no longer usable. The indication of the deactivation code thus indicates in a clear way that the use of the data carrier for the purpose of data storage, data reproduction or data processing has ended. The information feud conveniently contains a number of additional information or instructions that explain the user the further procedure.

4 shows an exemplary optical data carrier in a perspective view with a view of its optically non-scannable back. The back of the data carrier and thus the lamination 6 or the data carrier layer 10 is covered at least in a segment of the glued Abziehfeld 25. The peel-off field expediently consists of a sufficiently thin and sufficiently tear-resistant, with the back of the disk sufficiently firmly bonded film surface, which in the use of the data carrier, i. during its rotation, causing only minimal imbalance.

Conveniently, the film of the peel-off also cover the entire back of the disk and be designed as a label or an ornament of the disk. It is advantageous if the peel-off at a suitable location, for example at the edge of the data carrier, a non-bonded to the back of the disk portion in the form of a tab that allows a simplified detection of the peel-off.

FIG. 5 shows the data carrier shown in FIG. 4 with the information field 15 uncovered. The peel-off field 25 now removed is shown with the destroyed data carrier layer 10 in the form of the remnants 11 of the data carrier layer now partially adhering to the carrier body 5 and partially to the peel-off field 25 / or the lamination 6. Furthermore, the exposed information field 15 is shown. It is expedient that the peel-off field 25 after the exposure of the information field still stick to some sections of the now devalued disk. As a result, it can be visually checked in a simple manner during the return of the invalidated data carrier whether the returned canceled data carrier is identical to the previously issued data carrier.

FIGS. 6 and 7 show an exemplary data carrier with a conventional layer construction for a DVD. In this case, the data carrier layer 10 is enclosed between the carrier body 5 which is directed in the direction of the reading and scanning mechanism and a foil body 30 which forms the rear side of the data carrier and which at the same time has a number of design features 35 can be printed. The film body 30 has identification features of the data body. In the example shown in FIG. 6, these are a machine-readable barcode 40 on the surface of the film body 30 and an identification code 41 in plain text, which is located in the vicinity of the hole 45 in this embodiment. The background of the identification code 41 is opaque, in particular white, in the example of FIG. The film body 30 has a standard for CDs or DVDs rigidity. In principle, it can have identical material properties as the carrier body 5 of the data carrier.

As is apparent from Fig. 7, the film body 30 is lifted from the carrier body 5, wherein the data carrier layer between the film body and carrier body is at least partially destroyed and illegible. In this case, the area of the identification code 41 in the vicinity of the hole 45 is also removed and releases the underlying information field 15 with the deactivation code 20.

In an illustrated in Fig. 8 data carrier in the form of developed by the company Sony and become known under the trademark "Blue Ray Disc" embodiment of the data carrier of the carrier body 5 is formed of a paper or other composite material on its surface directly the data carrier layer 10. The carrier body is constructed, at least in sections, from a mutually detachable layer composite of sheets 50 and 51. As shown in Fig. 9, this layer structure can be split with a sharp object, eg a knife blade 60. The carrier body 5 tears open and reveals the information field 15, hidden inside it between the two sheets 50 and 51, with the deactivation code 20, whereby the data carrier layer is torn. Conveniently, the sheet 51 immediately under the data carrier layer 10 can be segmented or raster-like through a series of predetermined breaking points 52 be nterteilen that break apart during splitting and can not be joined together again, causing the disk layer is irreversibly destroyed.

Alternatively, the deactivation code may be hidden under a scratch-off field embedded in the carrier body 5 of the blue-ray disc, the exposure of the deactivation code being performed by abrading the data carrier layer takes place from the carrier body. For this purpose, further instructions for exposing the information field can be contained on the carrier body. This can be, for example, indications of the exact location of the scratch-off field or of the laminar segment of the carrier body.

Of course, in the embodiment of the blue-ray disc, the carrier body may be provided with the mentioned clearly readable machine codes 40 and 41 on the back side thereof.

A number of exemplary methods for using the data carrier described in the preceding figures will now be described. It should be noted that the method steps mentioned below can easily be supplemented by a number of additional advantageous or advantageous embodiments.

The first exemplary application relates to a rental of the described optical data carrier, for example in the form of a DVD in a video library. A rental station stores a certain supply of the described optical data carriers and manages a series for each user and the rental station open recognizable cataloging of the individual storage media and the respective belonging to the cataloging, initially only the rental station known deactivation vierungscode 20 for each disk. The cataloging markings are expediently mounted on the data carrier by the mentioned barcode 40 or the identification feature 41. The user lends the optical data carrier at the rental station, the time of the rental start being booked in the rental office. The user uses the optical data carrier, for example a DVD or an audio CD or a CDROM with software data, over a certain period of time. After expiration of the period of use, which can be chosen freely in principle, the user removes the peel-off field 25 or the film body 30 or splits the carrier body along the sheets 50 and 51, depending on the embodiments shown. The data carrier thereby becomes unusable. The deactivation code indicated on the information field 15 is read by the user and communicated with the cataloging identification to the rental office by telephone or other suitable means. At the rental office, the transmitted deactivation code is stored with the pre-stored Deactivated code of the cataloged disk and, if both codes match, the optical disk deleted from the list of lent disks, or the date of transmission of the deactivation code registered and thus calculates the rental period.

Such a procedure can be carried out fully automatically within the scope of electronic data processing. In this case, there is a database in the rental station or any other location that manages the cataloging tags and deactivation codes of the borrowed media, and registers and posts rental and deactivation times. In this case, the user transmits the deactivation code by electronic means, for example by email, or speaks the deactivation code over the telephone connection in a voice recognition module, which passes the detected deactivation code to the database. In this advantageous embodiment of the method can in principle be a minute exact booking of the rental period of the disk carried out, which is performed completely independent of opening hours or business hours of the rental station. The inventory management of the data carriers can be carried out via the machine-readable barcodes 40 or the identification features 41 and, in principle, likewise be carried out fully automatically. Hereby, it is possible to carry out the rental process by machine in the context of rental machines or fully automatic magazines, which is designed in combination with a database for inventory management and for calculating the rental duration of each individual data carrier.

In principle, the rental period can be chosen arbitrarily long. Its length depends only on the time at which the user invalidates the disk in one of the above ways. It is thus also possible for the data carrier to remain active for an unrestricted period of time and to be used, and the data carrier in fact to pass into the possession of the user, wherein the rental office has control over the whereabouts of the data carrier. This control is possible in two ways. On the one hand, the user has no possibility to get the deactivation code without invalidating the data carrier and thus to falsify the rental period or to give the rental office false information. On the other hand, the user will not be interested in having one for him to hide unusable data carrier with a now known deactivation code of the rental agency. The unusable disk is useless.

This control facility makes it possible, in particular, for the rental agency, after expiry of a suitably chosen longer period, to demand from the user a type of down payment for the loaned data medium and / or to provide the user with an original data carrier, i. For example, an original DVD, passes. In conjunction, the rental agency may request the user to validate the media and identify themselves with the deactivation code to the rental agency. This makes it possible to realize a number of very different sales, rental and usage strategies.

In order to further promote customer loyalty between the rental office and the user, a deposit return for the unusable storage medium can be introduced in addition. The user will then be refunded upon return of the canceled data carrier to the rental agency a certain amount of money previously deposited. The return of the depreciated data carrier can take place at any desired time, expediently in conjunction with a borrowing of another data carrier.

An advantage of this procedure is that the rental agency guarantees to the lending users on the one hand guaranteed unused and therefore with high probability undamaged disk and on the other hand can flexibly plan the supply of data carriers according to demand. For this purpose, the rental agency can provide a basic assortment of original data carriers, for example original DVD, audio CD or CDROM, of which a suitable number of copies are each made. For this purpose, the commercially available CD blanks can be used. After completion of the copying process, commonly referred to as "burning", the information field with the page labeled with the deactivation code is placed on the back of the fired copy and the peel surface is glued so that the information field is completely covered and no longer visible.

These copies are given to users, with each user receiving a copy of the original volume used only by him or her. The original data carriers themselves remain in the rental station. such Copies may be provided with a software-like copy protection, which excludes unauthorized duplication of the copies thus created by the user.

The method or the optical data carrier described can be linked to a licensed or temporary software use, for example in the context of a lent computer game. For this purpose, usually cheaper or free software versions are offered, which can later be replaced by complete versions or supplemented with additional software modules. Often, however, it is up to the licensor to control the distribution of pre-sales or licensed full versions. For this purpose, the described optical data carrier can be used.

For this purpose, the previously described optical data carrier, in this case a CDROM or a data DVD, is output to a software user in connection with an enabling code. The activation code is transmitted to the licensor at the start of the use of the software present on the data carrier on a computer system of the user. The transmission and / or the confirmation of the activation code marks the beginning of the use of the software. After a certain period of use, the data carrier is canceled as described above and the deactivation code visible on the information field is transmitted to the licensor. The Licensor determines the useful life of the Software on an internal database from the time elapsed between the submission of the activation code and the transmission of the deactivation code and issues a corresponding invoice.

It is also possible to issue a full version of the software in response to the transmission of the deactivation code to the user. This can prevent uncontrolled retransmission of the data carrier with the pre-release version or uncontrolled licensing of the full version. The pre-version of the software stored on the optical data carrier according to the invention can basically be copied as often as desired in such a method. In this case, only the user who is in possession of the data carrier originally issued by the licensor has authorization to purchase the full version of the software. All other Users may dispose of the pre-release version of the software freely, but an uncontrolled distribution of the full version is effectively prevented in favor of the licensor by a clear assignment and control of the originally issued data carrier is feasible. The number of licensed full versions in this case corresponds exactly to the number of originally issued volumes with the pre-release versions.

On the one hand, the degree of familiarity of the software can be increased with such a method; on the other hand, the uncontrolled spread of the full version is in a simple manner limited.

Finally, it is also possible to install a free code for the software stored on the disk on the information field. In this case, the user receives, for example, from a software house a data carrier according to the invention according to one of the described embodiments. An installation of the stored software on the user's computer then makes it possible to use a demo or pre-release version of the software if the user invalidates the data carrier and enters the unlock code readable in the information field as part of an installation routine. The disk is destroyed and can not be duplicated. Registration of the user in connection with a payment of license fees now makes it possible to create a personalized backup copy of the software or to obtain a full version of the software, whereby the reinstallation or reinstallation of the full version is automatically personalized or leads to further activation steps. In this procedure, the registration of the software can be made only once and piracy is considerably more difficult.

In connection with the open or machine-readable identification code 40 or 41 on the disk and the following method is conceivable.

In a first step, in a region of the data carrier, in particular a CD or DVD, which is not used for the actual data storage, the identification code, for example in the form of the bar code inscribed so that in particular the read head of the disk drive can read this identification code from the disk. This identification can be serialized moderately after the usual CD / DVD pressing on the blank before the actual process of CD or DVD burning done.

Now the user can temporarily acquire software or audio or video data by downloading and storing these data in a personalized manner from a file server using the known file transfer programs, especially ftp and its enhancements, and storing them on the identifiable blank, i. the CD or DVD is burning. In conjunction with this, the user's CD / DVD drive reads the identification code from the blank and transmits that code to the server. The identification code then serves as a key to the file server. The downloaded software is subsequently only usable if it is executed exclusively with this single data medium. The software license then ends as previously described with the invalidation of the data carrier and the transmission of the deactivation code. Of course, a writing of the identification code on the actual data tracks of the disk is also possible, provided that the driver software for the operation of the drive or burner has been adapted in a corresponding manner and each disk is burned individually.

In conjunction with publicly available accessories and design elements, in particular booklets or stickers, which may be distributed, for example in the form of inserts of magazines or magazines, the user can complete his own burned and registered storage medium.

The invention has been explained in more detail with reference to embodiments. It will be understood that within the scope of skill in the art a number of additional modifications, additions or omissions may be made without departing from the spirit of the invention. Further embodiments emerge in particular from the subclaims.

LIST OF REFERENCE NUMBERS

5 carrier body

6 Waiting Data carrier layer Remains of the data carrier layer Information field Deactivation code Peel-off field Film body Design feature Barcode Identification feature CD / DVD hole Carrier sheets Break points Knife blade summary

Claims

claims

1. Disk, in particular optical disk such as CD, DVD, and the like storage medium with a Entwertungsmöglichkeit, characterized in that the Entwertungsmögichkeit in the form of a carrier body, in particular a carrier disk (5), detachable data carrier layer (10) is formed, wherein at an information field (15) hidden from an unreleasable data carrier layer and exposed only in the case of a detached data carrier layer.

2. A data carrier according to claim 1, characterized in that in an exposed information field (15) the detached data carrier layer (10) is irretrievably destroyed.

3. A data carrier according to claim 1 and 2, characterized by a on the information field (15) arranged deactivation code (20).

4. A data carrier according to claim 1 to 3, characterized in that in the data carrier layer (10) are activated by an enable code activatable data.

5. A data carrier according to one of the preceding claims, characterized in that a glued on the non-scannable back of the data carrier film-like Abziehfeld (25) is provided, wherein the information field (15) between the back of the data carrier layer and the peel-off is included.

6. A data carrier according to one of claims 1 to 4, characterized in that the non-scannable back of the data carrier in the form of one of the carrier disc (5) detachable film body (30) is formed.

7. A data carrier according to one of claims 1 to 6, characterized in that the non-scannable back has a machine-readable identification code, in particular in the form of a bar code, a magnetic stripe, an RFID chip and the like coding means.

8. Data carrier according to one of the preceding claims, characterized in that the data carrier layer (10) is an optical storage layer.

9. A data carrier according to one of claims 1 to 7, characterized in that the data carrier layer (10) is a magnetic memory layer.

10. A data carrier according to one of claims 1 to 7, characterized in that the data carrier layer is a magneto-optical storage layer.

11. A data carrier according to one of the preceding claims, characterized in that the carrier body is a carrier tape.

12. A method for the temporary use of an optical data carrier according to claim 1 to 5, characterized by the following method steps;

Output of the optical data carrier with an intact and unresolved data carrier layer (10) by a rental point to a user,

Use of the optical data carrier,

subsequent detachment and destruction of the data carrier layer in conjunction with an exposure of the information field (15) at any time interval,

Transmitting the deactivation code (20) readable on the exposed information field to the rental agency.

13. The method according to claim 12, characterized in that in addition the data stored on the data carrier layer (10) data are activated by a release code, wherein

- in connection with which an activation time is stored, and

- After transmission of the deactivation code (20) a Deaktivivierung time is stored and a time difference between the activation time and deactivation time is determined and stored.