DE4242247A1 - Data carrier - has optical disc storage contg. encrypted data on spiral tracks read by laser, with key stored in associated microprocessor - Google Patents

Abstract

The data carrier (1) has an embedded microprocessor chip (2) with a series of surface contacts for access. Formed on the card is an optical data carrier (3) that has a CD disc format. The disc section is 45 mm in diameter with a 4 mm gap to the edges of the card. The card is inserted into a reader that has a laser beam deflected to follow the curved track formed on the disc section. USE/ADVANTAGE - For data card in accordance with ISO-standard 7810 and 7816 with high capacity optical memory.

Description

The invention relates to an identification card, preferably according to ISO standard 7810 and 7816, with a Microprocessor chip with its contacts in relation to two Reference edges is arranged off-center and on the one optical disk is arranged.

It is known to have an optical on an identity card Data carrier in the form of a laser-inscribed strip, who has only a few characters to muster.

It is also known in accordance with ISO 7810 and ISO standards 7816, a microprocessor chip on an ID card to arrange in which to store programs and data and Programs must be processed and data read, can be written and edited using Contacts are interchangeable with an external device.

It is also known to have disc-shaped data Data carriers with laser writing instruments spiral record and with appropriate laser readers read. This spiral data recording provides much higher storage densities than the known linear ones ID card records. The spiral Recording digital data is especially for Music recordings, i.e. a mass market, so that relatively inexpensive reading and writing devices Are available. Devices are known for this, the one spiral guidance of the laser for writing and reading  of the fixed data carrier.

The object of the invention is to provide a high identification card to create optical storage capacity using inexpensive devices to edit.

The solution is that on the ID card outside of the microprocessor chip at least one optical data storage area spirally after a CD Standard is structured.

The spiral center is preferably approximately in the middle in a space between the microprocessor chip and the three adjacent ID card edges.

Advantageous embodiments are in the subclaims specified.

It can be optical on one or both sides Data storage area may be provided. The two Arrangements are preferably complementary to one another, that when the card is turned over, it is the same Laser device can be edited. At a thus the symmetrical position of the center bilateral storage areas concentric.

The relatively large storage capacity of the optical Disk allows large quantities, in particular personal, data, e.g. B. a medical history as well Treatment and billing data to be saved, the ID card is a completely new kind of use feed.

The novel ID card is advantageous for such new applications with security coding and decryption means equipped so that the personal data only from authorized persons, especially the  ID card holder to enter and / or read and / or are to be changed.

The security means are advantageous in the Microprocessor chip on the same ID card housed so that encryption and decryption there takes place and only encrypted data between the Microprocessor and the external optical reading and Writing station can be replaced. Decrypted data are only together when entered by the authorized person with the identifier that is used for a Initialization was transferred to the processor in advance, as well as when asked by the authorized person at Disclosure of the identifier handled externally.

It is advantageously provided that the identifier at Initialization encoded in the microprocessor chip and is stored so that an unauthorized reading of the identifier is practically impossible. When checking the identifier the entered identifier is encrypted in the same way as for the Initialization and a comparison with the filed encrypted identifier made, which only for one Identity established further program instructions, e.g. B. to Read, edit or decrypted output optically stored data.

Advantageous configurations are shown in FIGS. 1 to 3.

Fig. 1 shows a top view of the identity card;

Fig. 2 shows a bottom view of a card embodiment;

Fig. 3 shows an operating system schematically.

Fig. 1 shows an identification card ( 1 ) with a microprocessor chip ( 2 ), the contacts (K) of which are arranged in a standardized arrangement with respect to the reference edges (BK1, BK2) of the identification card ( 1 ). On the larger card area next to the microprocessor chip ( 2 ), an optical data carrier ( 3 ) is arranged approximately centrally to this area, which is formed from a spiral track in the manner of a CD arrangement. In order to achieve the largest possible storage capacity, the center (Z) lies approximately in the middle of the free card area and the edge of the recording spiral extends close to the card edges. The diameter (D) of the memory area ( 3 ) is slightly smaller than the card width (B) and is, for example, 45 mm, so that about 4 mm of free space to the three adjacent card edges and to the adjacent circuit contacts (K) as usable space for the arrangement the reading device and its guide elements remain when the card is inserted into a reading or writing device.

Fig. 2 shows an underside of the card ( 1 ) in which an optical data storage area ( 3 A) with its center (ZA) is arranged coaxially to the optical data storage area on the other side of the card.

Fig. 3 shows a block diagram of a card reading device in connection with the microprocessor ( 2 ) and the optical data memory ( 3 , 3 A). The card reading device consists, for example, of an external computer processor (EP) with an input device (E) and an output device (A). The actual reading device (LG) comprises a contacting arrangement (KA) which uses the contacts (K) of the microprocessor chip ( 2 ) to establish the power supply and data connections to it. Furthermore, the reading device comprises a laser reading and possibly writing device (LA), which guides the laser beam along the spiral data recording track in a known manner via a positioning device and thereby writes the data by means of appropriate pulses or reads them at low laser power, as in each case is specified by the external processor.

Such laser devices for a CD disk, in which the Disk is stationary and the laser beam is guided, or the laser itself is guided on a spiral path is, are known from consumer electronics and can be easily used for data recording and reading.

In order to prevent unauthorized persons from reading the data from the optical data carrier, it is provided that a memory area is present in the microprocessor chip ( 2 ) which is used to store programs (P1, P2) and in particular key data (ISD1, SD2). serves. The first program (P1) is an initialization program (P1), which is also used for storing and in the same way for later checking of a user identity identifier (ISD1). This identifier is stored in the associated memory area (ISD1) and is preferably not readable. In addition, a coding key (SD2) is stored in an associated memory area during initialization, the program providing that this coding key (SD2) cannot be read out again by the external processor (EP). Furthermore, an encryption program (P2) is stored in the microprocessor ( 2 ) during the initialization, which likewise cannot be read out by the external processor (EP).

For the use of the optical data memory ( 3 ) for the introduction or readout of data, the respective user must log in with his identifier (ISD1) via the input device (E) by the external processor (EP) to the microprocessor ( 2 ), whereupon they do so entered identifier is checked using the program (P1). If there is an identity with the stored identifier (ISD1), the data which are to be stored are converted using the key program (P2) in accordance with the coding key (SD2) and are returned in encrypted form to the external processor (EP), from where these encrypted data fed to the laser device (LA) and then written to the optical data memory ( 3 , 3 A).

In order to read data by the authorized user, the identifier (ISD1) is first checked in a corresponding manner by means of the program (P1) and, if there is an identity, the data is read back translated using the decryption program (P2) with the coding key (SD2). It can be provided that some parts of the information are decrypted, only further processed in the microprocessor ( 2 ), and only certain encrypted data are returned to the external processor and by this to the output device (A).

Since the storage capacity of the optical data memory ( 3 ) is relatively large compared to conventional data memories on identity cards and credit cards, different data areas can be formed there, which are assigned to different address areas. The management of such areas, which serve different functions, is expediently carried out via the microprocessor ( 2 ), wherein, if desired, several authorization keys and further coding keys can also be used. In this way it is possible to address different data areas from different institutions without being able to access other areas in an unauthorized manner.

Claims (8)

1. ID card, preferably according to ISO standard 7810 and 7816, in which a microprocessor chip ( 2 ) with its contacts (K) is arranged off-center with respect to two reference edges (BK1, BK2), and on which an optical data carrier is arranged, characterized in that at least one optical data storage area ( 3 , 3 A) is arranged in a spiral structure on the identification card ( 1 ) outside the microprocessor chip ( 2 ). 2. ID card according to claim 2, characterized in that the spiral center (Z) of the data storage area ( 3 ) lies approximately in the middle in a space between the microprocessor chip ( 2 ) and the three adjacent ID card edges. 3. ID card according to claim 1 or 2, characterized in that the diameter (D) of the optical data storage area ( 3 ) is slightly smaller than the width (B) of the identification card. 4. ID card according to one of the preceding claims, characterized in that one of the data storage areas ( 3 A) on the opposite side of the ID card ( 1 ) as the contacts (K) is arranged. 5. ID card according to claim 4, characterized in that one of the data storage areas ( 3 , 3 A) is arranged on both sides of the ID card and these are complementary to the card edges and / or concentric with each other. 6. ID card according to one of the preceding claims, characterized in that the optical data storage area ( 3 ) contains encrypted recorded data, the coding key (SD2) and encryption and decryption program (P2) are stored in the microprocessor chip ( 2 ). 7. ID card according to claim 6, characterized in that the encryption and decryption program (P2) can be addressed via an identification program (P1) which is stored together with an identification identifier (ISD1) in the microprocessor chip ( 2 ). 8. ID card according to claims 6 or 7, characterized in that the identification program (P1), the identification identifier (ISD1), the encryption and decryption program (P2) and the coding key (SD2) are stored in the microprocessor chip ( 2 ) in this way are that they cannot be read out via the contacts (K).