Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1988-03-04
1988-11-22
Pitts, Harold I.
Registers
Systems controlled by data bearing records
Credit or identification card systems
G06K 500
Patent
active
047867906
ABSTRACT:
A random number (v) generated in a customer chip card (KK) selects individual program parts (Pv) from the sensitive program data (P) for the data flow control, selecting these both in the customer card as well as in a customer terminal (KT). A respective authentication code (PACv) is formed from these program parts (Pv) with the assistance of an authentication algorithm (f) and of a secret cipher (KPC) and, finally, the authentication code (PACv) calculated in the customer chip card (KK) and the authentication code (PACv) calculated in the customer terminal (KT) are checked for identity in a comparison means (COMP) provided in the customer card (KK).
REFERENCES:
patent: 4295039 (1981-10-01), Stuckert
Beutelspacher Albrecht
Kersten Annette-Gabriele
Kruse Dietrich
Pitts Harold I.
Siemens Aktiengesellschaft
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