IC card and authentication method for information processing app

Details IC card and authentication method for information processing app IC card and authentication method for information processing app

1996-10-02

1999-01-05

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 9, 380 23, 380 49, 380 50, 235380, H04L 932, H04L 900

Patent

active

058570241

ABSTRACT:
An IC card 30, which is employed to permit the exchange of secret information while ensuring that security is maintained, includes: a ROM 38 in which an ID is held; a clock 42; a RAM 40 in which a password is stored; a RAM 36 in which a ciphering program is stored; and a CPU 34 that executes a process. The ciphering program is loaded, the stored ID, password and the time t measured by the clock 42 are read and encoded in accordance with the ciphering program, and the results are outputted to a computer system 10. The computer system 10 decodes the output from the IC card 30 and extracts a password, and compares the decoded password with a registered password. When the passwords match, access is enabled; but when they do not match, access is disabled.

REFERENCES:
patent: 4450535 (1984-05-01), De Pommery et al.
patent: 4910774 (1990-03-01), Barakat

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