EP0138386A2
Expired / Lapsed
EP
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Identification card
Assignee: Toshiba Corp
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Filing: 1984-09-13
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Granted: —
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Expires: 2004-09-13
Abstract
Abstract An identification card (5), used for data communication between an on-line terminal (2) and a host system (1), has an IC chip (17) mounted thereon. The IC chip (17) includes a key code generating circuit (22) which generates a key code from a preassigned code number stored in the memory (21) of the chip and a random number supplied from the host system through a card terminal (19). An encrypter (23), which is on the card (5) and is part of the IC chip, encrypts output data from the memory (21), using the key code, before that data is sent to the host system (1) via the terminal (2).
Inventors
- 👤 Naoshi C/O Patent Division Uchihira
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:59
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/38; G06Q20/40; G06Q20/409; G06Q20/4097; G06Q20/40975; G07F7/1016
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
165 words
A card (5) having a self-contained integrated circuit (17) for communicating with a data communication system (1, 2, 3) with which the card is to be used, the integrated circuit including memory means (21, 51, 62) for storing data to be outputted to the communication system; characterised in that the memory means (21, 51, 62) stores a code number preassigned individually to the card (5) and in that the integrated circuit (17) further includes key code generating means (22) for generating a key code by a logical operation between the preassigned code number in the memory means (21, 51, 62) and a random number supplied to the card (5) by the communication system (1, 2, 3), and encrypting means (25, 53, 60) connected to the memory means (21, 51, 62) and the key code generating means (22) for encrypting data stored in the memory means and to be outputted to the communication system, using the key code derived from the key code qenerating means (22).
Claim 2
Dependent Claim
165 words
A card (5) having a self-contained integrated circuit (17) for communicating with a data communication system (1, 2, 3) with which the card is to be used, the integrated circuit including memory means (21, 51, 62) for storing data to be outputted to the communication system; characterised in that the memory means (21, 51, 62) stores a code number preassigned individually to the card (5) and in that the integrated circuit (17) further includes key code generating means (22) for generating a key code by a logical operation between the preassigned code number in the memory means (21, 51, 62) and a random number supplied to the card (5) by the communication system (1, 2, 3), and encrypting means (25, 53, 60) connected to the memory means (21, 51, 62) and the key code generating means (22) for encrypting data stored in the memory means and to be outputted to the communication system, using the key code derived from the key code qenerating means (22).
Claim 3
Dependent Claim
42 words
A card according to clai'm 1 which further includes at least one input terminal (19) adapted to connect electrically with a corresponding terminal of the communicating system and connected to the key code generating means (22), whereby the random number is supplied.
Claim 4
Dependent Claim
42 words
A card according to clai'm 1 which further includes at least one input terminal (19) adapted to connect electrically with a corresponding terminal of the communicating system and connected to the key code generating means (22), whereby the random number is supplied.
Claim 5
Dependent Claim
36 words
A card according to claim 1 or claim 2, wherein the integrated circuit (17) further includes decrypting means (53) responsive to the received key code for decrypting input data from the communication system (1, 2, 3).
Claim 6
Dependent Claim
26 words
A card according to claim 3, wherein the integrated circuit (17) has means (55) for writing the input data after decryption into the memory means (51).
References Cited (Backward Citations)
No citation records indexed.
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