EP0664520A2 - System with optical card and corresponding read/write-device - Google Patents
System with optical card and corresponding read/write-device Download PDFInfo
- Publication number
- EP0664520A2 EP0664520A2 EP94107335A EP94107335A EP0664520A2 EP 0664520 A2 EP0664520 A2 EP 0664520A2 EP 94107335 A EP94107335 A EP 94107335A EP 94107335 A EP94107335 A EP 94107335A EP 0664520 A2 EP0664520 A2 EP 0664520A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- read
- optical card
- write
- optical
- manufacturer
- 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.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
- G07F7/086—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer
Definitions
- the invention relates to a unit consisting of an optical card and an associated read / write device.
- optical data carriers in the form of so-called optical cards have the great advantage that they can hold very large amounts of data, which are very insensitive to external influences due to the optical scanning method.
- the optical card has the further advantage that it is very handy due to its size.
- the optical card is used in particular to store X-ray images and accompanying data.
- Such optical cards can be processed by means of an appropriate read / write device, i.e.
- Corresponding data for example the X-ray images already mentioned, can be stored on the optical cards by means of this device. Furthermore, if necessary, the corresponding data can be called up by the corresponding reading device and made visible on a screen, for example.
- the invention is therefore based on the object of creating an improved unit comprising an optical card and an associated read / write device.
- the invention proposes that the optical card and the read / write device have a special electronic key which corresponds to one another in such a way that only the optical card marked in this way is by means of the associated read / write device and vice versa are compatible editable.
- the basic idea is that this electronic protection prevents the read / write devices for optical cards from a very specific manufacturer from being used by commercially available optical cards.
- the invention therefore provides to mark both the optical cards and the read / write devices in such a way that only the optical cards marked in this way can be processed by the associated read / write devices. If, for example, an optical card is entered into the read / write device that does not have this special electronic marking, this optical card is output again as faulty. Conversely, an optical card specially marked in this way cannot be processed by "normal” read / write devices. This protection therefore ensures that only manufacturer-specific optical cards can be processed with manufacturer-specific read / write devices.
- a further development of the unit according to the invention proposes that the optical card has been marked with the electronic key by the manufacturer and that the read / write device of the consumer has a device for electronically decrypting the optical card marked in this way.
- This provides a technically simple way to prevent the abuse described.
- the manufacturer has already provided the optical cards with the manufacturer-specific electronic key.
- the optical cards marked in this way are then issued to the end user. This is then in the possession of a special read / write device which is modified accordingly, so that only the read / write device modified in this way can decrypt the optical cards marked in this way and processing is possible.
- optical card is formatted with a special electronic key. This means that the optical cards are given an electronic key by the formatting, which means that they only fit the read / write devices that have the same key.
- the formatting of the optical cards represents is a technically simple way to mark the optical cards.
- the read / write device has an EPROM.
- the Eprom has been programmed by the manufacturer in such a way that the appropriate decryption is possible.
- a password is additionally assigned by software to the optical card from the manufacturer.
- a corresponding marking program in particular a formatting program modified in the manner according to the invention, in order to format optical cards from other manufacturers, so that the optical cards marked in this way can be used to read them with the manufacturer's modified card / Use a writing device.
- each optical card is additionally provided with its own password by the manufacturer, in particular when formatting the corresponding software.
- the optical cards are thus given a manufacturer-specific, software-based password protection, in addition to the existing marking. Only this password protection characterizes the optical cards issued in this way as coming from a specific manufacturer.
- optical cards according to the invention can thus not be circumvented by commercially available formatting programs, provided that someone intends to use such a formatting program for special formatting of the optical cards. This also requires a very specific password.
- password protection of the optical cards means securing the data through unauthorized access and misuse by unauthorized persons in the sense of data protection of the information written on the optical card. This protection system thus guarantees data protection of the data written on the optical card, i.e. this data cannot be viewed by unauthorized read / write devices, since accessing the data using a very specific read / write device requires knowledge of the programmed password.
- Fig. 2 shows the extended form with the password.
- the optical cards modified in this way with the programmed password are only compatible with a read / write device which, on the one hand, has been modified in order to decrypt the electronic marking and, moreover, has the corresponding password software.
- Optical cards, which are modified in the sense of electronic encryption but do not have a password, are incompatible with the read / write devices equipped with a password.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Recording Or Reproduction (AREA)
- Storage Device Security (AREA)
Abstract
Description
Die Erfindung betrifft eine Einheit aus optischer Karte sowie zugehörigem Lese/Schreib-Gerät.The invention relates to a unit consisting of an optical card and an associated read / write device.
Optische Datenträger in Form der sogenannten optischen Karten haben den großen Vorteil, daß sie sehr große Datenmengen fassen können, die durch die optischen Abtastverfahren sehr unempfindlich gegen äußere Einwirkungen sind. Die optische Karte hat weiterhin den Vorteil, daß sie aufgrund ihrer Scheckkartengröße sehr handlich ist. Im vorliegenden Fall dient die optische Karte insbesondere zum Speichern von Röntgenaufnahmen sowie begleitender Daten.Optical data carriers in the form of so-called optical cards have the great advantage that they can hold very large amounts of data, which are very insensitive to external influences due to the optical scanning method. The optical card has the further advantage that it is very handy due to its size. In the present case, the optical card is used in particular to store X-ray images and accompanying data.
Derartige optische Karten können mittels eines entsprechenden Lese/Schreib-Gerätes bearbeitet werden, d.h. auf die optischen Karten können mittels dieses Gerätes entsprechende Daten, beispielsweise die bereits erwähnten Röntgenbilder gespeichert werden. Weiterhin können bei Bedarf die entsprechenden Daten durch die entsprechende Leseeinrichtung abgerufen und beispielsweise auf einem Bildschirm sichtbar gemacht werden.Such optical cards can be processed by means of an appropriate read / write device, i.e. Corresponding data, for example the X-ray images already mentioned, can be stored on the optical cards by means of this device. Furthermore, if necessary, the corresponding data can be called up by the corresponding reading device and made visible on a screen, for example.
Ein Problem besteht darin, daß mit den herkömmlichen Lese/Schreib-Geräten alle handelsüblichen optischen Karten bearbeitet werden können. Dies gilt umgekehrt gleichermaßen. Dies erweist sich aber dann von Nachteil, wenn ganz bestimmte optische Karten nur mit ganz bestimmten Lese/Schreib-Geräten bearbeitet werden sollen.One problem is that all conventional optical cards can be processed with conventional read / write devices. Conversely, this applies equally. However, this proves to be disadvantageous if very specific optical cards are to be processed only with very specific read / write devices.
Davon ausgehend liegt der Erfindung daher die Aufgabe zugrunde, eine verbesserte Einheit aus optischer Karte sowie zugehörigem Lese/Schreib-Gerät zu schaffen.Proceeding from this, the invention is therefore based on the object of creating an improved unit comprising an optical card and an associated read / write device.
Als technische Lösung wird mit der Erfindung vorgeschlagen, daß die optische Karte und das Lese/Schreib-Gerät einen speziellen elektronischen, miteinander korrespondierenden Schlüssel derart aufweisen, daß nur die so markierte optische Karte mittels dem so ausgebildeten, zugeordneten Lese/Schreib-Gerät und umgekehrt kompatibel bearbeitbar sind.As a technical solution , the invention proposes that the optical card and the read / write device have a special electronic key which corresponds to one another in such a way that only the optical card marked in this way is by means of the associated read / write device and vice versa are compatible editable.
Dadurch ist ein elektronischer Schutz für optische Karten geschaffen, der vor Mißbrauch durch unberechtigte Personen schützt. Die Grundidee besteht dabei darin, daß durch diesen elektronischen Schutz verhindert wird, daß die Lese/Schreib-Geräte für optische Karten eines ganz bestimmten Herstellers durch handelsübliche optische Karten mitverwendet werden. Die Erfindung sieht deshalb vor, sowohl die optischen Karten als auch die Lese/Schreib-Geräte so zu markieren, daß nur die so markierten optischen Karten durch die zugehörigen Lese/Schreib-Geräte verarbeitet werden können. Wird beispielsweise eine optische Karte in das Lese/Schreib-Gerät eingegeben, welches diese spezielle elektronische Markierung nicht trägt, wird diese optische Karte als fehlerhaft wieder ausgegeben. Umgekehrt kann eine auf diese Art und Weise speziell markierte optische Karte auch nicht von "normalen" Lese/Schreib-Geräten bearbeitet werden. Durch diesen Schutz ist also gewährleistet, daß ausschließlich nur herstellerspezifische optische Karten mit herstellerspezifischen Lese/Schreib-Geräten bearbeitet werden können.This creates electronic protection for optical cards, which protects against misuse by unauthorized persons. The basic idea is that this electronic protection prevents the read / write devices for optical cards from a very specific manufacturer from being used by commercially available optical cards. The invention therefore provides to mark both the optical cards and the read / write devices in such a way that only the optical cards marked in this way can be processed by the associated read / write devices. If, for example, an optical card is entered into the read / write device that does not have this special electronic marking, this optical card is output again as faulty. Conversely, an optical card specially marked in this way cannot be processed by "normal" read / write devices. This protection therefore ensures that only manufacturer-specific optical cards can be processed with manufacturer-specific read / write devices.
Eine Weiterbildung der erfindungsgemäßen Einheit schlägt vor, daß die optische Karte herstellerseitig mit dem elektronischen Schlüssel markiert worden ist und daß das Lese/Schreib-Gerät des Verbrauchers eine Einrichtung zum elektronischen Entschlüsseln der so markierten optischen Karte aufweist. Dadurch ist eine technisch einfache Möglichkeit gegeben, um dem geschilderten Mißbrauch vorzubeugen. Zu diesem Zweck werden vom Hersteller die optischen Karten bereits mit dem herstellerspezifischen elektronischen Schlüssel versehen. Die so markierten optischen Karten werden dann an den Endverbraucher ausgegeben. Dieser ist dann im Besitz eines speziellen Lese/Schreib-Geräts, welches entsprechend modifiziert ist, so daß nur das so modifizierte Lese/Schreib-Gerät die so markierten optischen Karten zu entschlüsseln vermag und eine Bearbeitung möglich ist.A further development of the unit according to the invention proposes that the optical card has been marked with the electronic key by the manufacturer and that the read / write device of the consumer has a device for electronically decrypting the optical card marked in this way. This provides a technically simple way to prevent the abuse described. For this purpose, the manufacturer has already provided the optical cards with the manufacturer-specific electronic key. The optical cards marked in this way are then issued to the end user. This is then in the possession of a special read / write device which is modified accordingly, so that only the read / write device modified in this way can decrypt the optical cards marked in this way and processing is possible.
Eine weitere Weiterbildung schlägt vor, daß die optische Karte mit einem speziellen elektronischen Schlüssel formatiert ist. Dies bedeutet, daß die optischen Karten durch die Formatierung einen elektronischen Schlüssel erhalten, wodurch sie nur zu den Lese/Schreib-Geräten passen, die denselben Schlüssel besitzen. Die Formatierung der optischen Karten stellt eine technisch einfache Möglichkeit dar, um die optischen Karten zu markieren.A further development suggests that the optical card is formatted with a special electronic key. This means that the optical cards are given an electronic key by the formatting, which means that they only fit the read / write devices that have the same key. The formatting of the optical cards represents is a technically simple way to mark the optical cards.
Eine weitere Weiterbildung schlägt vor, daß das Lese/Schreib-Gerät ein Eprom aufweist. Dies stellt eine einfache technische Möglichkeit dar, um die Lese/Schreib-Geräte durch Einbau eines speziellen "Programm-Chips" hardwaremäßig so zu modifizieren, daß sie die speziell markierten, insbesondere speziell formatierten optischen Karten verarbeiten können. Das Eprom ist dabei derart herstellerseitig programmiert worden, daß die entsprechende Entschlüsselung möglich ist.A further development suggests that the read / write device has an EPROM. This represents a simple technical possibility to modify the hardware of the read / write devices by installing a special "program chip" so that they can process the specially marked, in particular specially formatted, optical cards. The Eprom has been programmed by the manufacturer in such a way that the appropriate decryption is possible.
Schließlich wird in einer Weiterbildung vorgeschlagen, daß zusätzlich noch der optischen Karte herstellerseitig softwaremäßig ein Paßwort zugeordnet wird. Prinzipiell wäre es nämlich natürlich noch möglich, daß Unbefugte ein entsprechendes Markierungsprogramm, insbesondere ein in der erfindungsgemäßen Weise modifiziertes Formatierprogramm verwenden, um herstellerfremde optische Karten zu formatieren, so daß die so markierten optischen Karten dazu verwendet werden können, um sie mit dem herstellerseitig modifizierten Lese/Schreib-Gerät zu benutzen. Um dies zu verhindern, wird gemäß der vorliegenden Weiterbildung insbesondere beim Formatieren von der entsprechenden Software herstellerseitig jede optische Karte zusätzlich noch mit einem eigenen Paßwort versehen. Die optischen Karten erhalten somit einen herstellerspezifischen, softwaremäßigen Paßwortschutz, und zwar zusätzlich zu der ohnehin vorhandenen Markierung. Erst dieser Paßwortschutz kennzeichnet die so herausgegebenen optischen Karten als von einem bestimmten Hersteller stammend. Somit kann der erfindungsgemäße Schutz für optische Karten nicht durch handelsübliche Formatierprogramme umgangen werden, sofern jemand die Absicht hätte, ein derartiges Formatierprogramm zum speziellen Formatieren der optischen Karten zu verwenden. Hierzu bedarf es dann zusätzlich noch eines ganz spezifischen Paßwortes. Umgekehrt bedeutet der Paßwortschutz der optischen Karten die Sicherung der Daten durch unerlaubten Zugriff und Mißbrauch durch Unbefugte im Sinne eines Datenschutzes der auf die optischen Karte geschriebenen Informationen. Somit wird weiterhin durch dieses Schutzsystem ein Datenschutz der auf der optischen Karte geschriebenen Daten garantiert, d.h. diese Daten können durch nicht autorisierte Lese/Schreib-Geräte nicht eingesehen werden, da der Abruf der Daten mittels eines ganz bestimmten Lese/Schreib-Gerätes die Kenntnis des einprogrammierten Paßwortes voraussetzt.Finally, it is proposed in a further development that a password is additionally assigned by software to the optical card from the manufacturer. In principle, it would of course still be possible for unauthorized persons to use a corresponding marking program, in particular a formatting program modified in the manner according to the invention, in order to format optical cards from other manufacturers, so that the optical cards marked in this way can be used to read them with the manufacturer's modified card / Use a writing device. In order to prevent this, according to the present development, each optical card is additionally provided with its own password by the manufacturer, in particular when formatting the corresponding software. The optical cards are thus given a manufacturer-specific, software-based password protection, in addition to the existing marking. Only this password protection characterizes the optical cards issued in this way as coming from a specific manufacturer. The protection for optical cards according to the invention can thus not be circumvented by commercially available formatting programs, provided that someone intends to use such a formatting program for special formatting of the optical cards. This also requires a very specific password. Conversely, password protection of the optical cards means securing the data through unauthorized access and misuse by unauthorized persons in the sense of data protection of the information written on the optical card. This protection system thus guarantees data protection of the data written on the optical card, i.e. this data cannot be viewed by unauthorized read / write devices, since accessing the data using a very specific read / write device requires knowledge of the programmed password.
In der Zeichnung ist das erfindungsgemäße Prinzip der Einheit aus optischer Karte sowie zugehörigem Lese/Schreib-Gerät dargestellt.In the drawing, the principle of the unit of optical card and associated read / write device according to the invention is shown.
So zeigt Fig. 1 zum einen das normale Lese/Schreib-Gerät samt zugehöriger normaler optischer Karte. Diese beiden "Normalkomponenten" sind miteinander kompatibel. Dem gegenüber steht das modifizierte Lese/Schreib-Gerät samt zugehöriger modifizierter optischer Karte, welche in dieser modifizierten Form ebenfalls miteinander kompatibel sind. Das Normal-System ist jedoch mit dem Modifikations-System jeweils inkompatibel. Ursprünglich hard- und softwaremäßig gleiche Lese/Schreib-Geräte werden also durch den Einbau eines speziellen "Programm-Chips" und durch die Vorprogrammierung der optischen Karten in zwei verschiedene Generationen aufgeteilt, die nur untereinander kompatibel sind. Nach der speziellen Formatierung der optischen Karten sind diese nicht mehr unter diesen zwei verschiedenen Systemen austauschbar, d.h. beschreib- und lesbar.1 shows the normal read / write device together with the associated normal optical device Map. These two "normal components" are compatible with each other. This contrasts with the modified read / write device together with the associated modified optical card, which are also compatible with one another in this modified form. However, the normal system is incompatible with the modification system. Read / write devices that were originally identical in terms of hardware and software are divided into two different generations by the installation of a special "program chip" and by the pre-programming of the optical cards, which are only compatible with one another. After the special formatting of the optical cards, they are no longer interchangeable, ie writable and readable, under these two different systems.
Fig. 2 zeigt die erweiterte Form mit dem Paßwort. Die so modifizierten optischen Karten mit dem einprogrammierten Paßwort ist nur kompatibel mit einem Lese/Schreib-Gerät, welches zum einen im Sinne der Entschlüsselung der elektronischen Markierung modifiziert ist und darüber hinaus die entsprechende Paßwort-Software aufweist. Optische Karten, welche zwar im Sinne der elektronischen Verschlüsselung modifiziert sind, jedoch kein Paßwort aufweisen, sind mit den entsprechend mit Paßwort ausgestatteten Lese/Schreib-Geräten inkompatibel.Fig. 2 shows the extended form with the password. The optical cards modified in this way with the programmed password are only compatible with a read / write device which, on the one hand, has been modified in order to decrypt the electronic marking and, moreover, has the corresponding password software. Optical cards, which are modified in the sense of electronic encryption but do not have a password, are incompatible with the read / write devices equipped with a password.
Claims (5)
dadurch gekennzeichnet,
daß die optische Karte und das Lese/Schreib-Gerät einen speziellen elektronischen, miteinander korrespondierenden Schlüssel derart aufweisen, daß nur die so markierte optische Karte mittels dem so ausgebildeten, zugeordneten Lese/Schreib-Gerät und umgekehrt kompatibel bearbeitbar sind.Optical card unit and associated read / write device,
characterized,
that the optical card and the read / write device have a special electronic key that corresponds to one another in such a way that only the optical card marked in this way can be processed in a compatible manner by means of the associated read / write device and vice versa.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934343478 DE4343478A1 (en) | 1993-12-21 | 1993-12-21 | Optical card unit and associated read / write device |
| DE4343478 | 1993-12-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0664520A2 true EP0664520A2 (en) | 1995-07-26 |
| EP0664520A3 EP0664520A3 (en) | 1997-11-12 |
Family
ID=6505532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94107335A Withdrawn EP0664520A3 (en) | 1993-12-21 | 1994-05-11 | System with optical card and corresponding read/write-device |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0664520A3 (en) |
| DE (1) | DE4343478A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61211791A (en) * | 1985-03-16 | 1986-09-19 | Hitachi Maxell Ltd | Optical recording card |
| JPH01286172A (en) * | 1988-05-12 | 1989-11-17 | Canon Inc | Information recording and reproducing device and information recording medium |
| EP0501508A2 (en) * | 1991-02-28 | 1992-09-02 | Olympus Optical Co., Ltd. | Recording and reproducing apparatus provided in each data block with a secret information number |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1524187A (en) * | 1974-10-16 | 1978-09-06 | Emi Ltd | Magnetic recording |
| DE2847756B2 (en) * | 1978-11-03 | 1980-08-21 | Hermann 7742 St Georgen Stockburger | Procedure for the secret identification and evaluation of machine-readable data carriers |
| JPS60208813A (en) * | 1984-04-02 | 1985-10-21 | Mitsubishi Electric Corp | Photoelectric converting device and manufacture therefor |
-
1993
- 1993-12-21 DE DE19934343478 patent/DE4343478A1/en not_active Withdrawn
-
1994
- 1994-05-11 EP EP94107335A patent/EP0664520A3/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61211791A (en) * | 1985-03-16 | 1986-09-19 | Hitachi Maxell Ltd | Optical recording card |
| JPH01286172A (en) * | 1988-05-12 | 1989-11-17 | Canon Inc | Information recording and reproducing device and information recording medium |
| EP0501508A2 (en) * | 1991-02-28 | 1992-09-02 | Olympus Optical Co., Ltd. | Recording and reproducing apparatus provided in each data block with a secret information number |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 011, no. 042 (P-545), 6.Februar 1987 & JP 61 211791 A (HITACHI MAXELL LTD), 19.September 1986, * |
| PATENT ABSTRACTS OF JAPAN vol. 014, no. 064 (P-1002), 6.Februar 1990 & JP 01 286172 A (CANON INC), 17.November 1989, * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4343478A1 (en) | 1995-06-22 |
| EP0664520A3 (en) | 1997-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69531082T2 (en) | Method and device with an encryption header, which makes it possible to test software | |
| DE69531079T2 (en) | Method and device with computer-dependent identification, which makes it possible to test software | |
| DE3811378C3 (en) | Information recording system | |
| EP0958552B1 (en) | Product data management system | |
| DE3407642C2 (en) | ||
| EP1065598A1 (en) | Method of protected access to a memory and corresponding memory device | |
| DE10023820B4 (en) | Software protection mechanism | |
| DE3041393A1 (en) | METHOD FOR CREATING A NUMBER OF AUTHORITIES | |
| DE2922882A1 (en) | METHOD FOR SECURING CARTRIDGES AND THEIR LABELS AND / OR PACKAGING AGAINST IMITATION | |
| DE4129067C2 (en) | Electronic device for performing a variety of functions | |
| EP1004116A1 (en) | Compact disc in check or business card format | |
| DD292987A5 (en) | METHOD FOR CONTROLLING THE USE OF AN INFORMATION SUPPORT, IN PARTICULAR A MAGNETIC OR OPTICAL-MAGNETIC, AND SYSTEMS FOR ITS USE | |
| DE4042161C2 (en) | ||
| EP0361491A2 (en) | Method for programming chip cards | |
| EP0664520A2 (en) | System with optical card and corresponding read/write-device | |
| DE2509313B2 (en) | Device for checking the authorization of the user to use a card | |
| DE19716015A1 (en) | Introducing information on a chip card | |
| DE60316183T2 (en) | METHOD AND DEVICE FOR ALTERNATE ACTIVATION OF AN INTERCHANGEABLE HARDWARE UNIT | |
| DE10035598A1 (en) | Data carrier with a data storage | |
| EP1472606A2 (en) | Code management device for the encoded storage of digital data words | |
| WO1998039743A2 (en) | Method for carrying out modifications in authorization data sets | |
| DE2901455A1 (en) | ARRANGEMENT AND PROCEDURE FOR OPTIONAL ACCESS TO A CIRCULAR MEMORY | |
| DE2853088C2 (en) | Office machine writing or similar data with exchangeable print type sets | |
| DE9318054U1 (en) | Device for preventing the use of a program copied without authorization on a data carrier | |
| EP0672998B1 (en) | Method for the production of ID-carts with tracks of black and white field distributions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE ES FR IT LI NL |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE ES FR IT LI NL |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19980513 |