Data processing system comprising authentification means viz a v

Details Data processing system comprising authentification means viz a v Data processing system comprising authentification means viz a v

1990-10-22

1992-09-08

Tarcza, Thomas H.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, 235380, H04K 100

Patent

active

051464993

ABSTRACT:
Authentication of a smart card is accomplished utilizing a microcomputer (PC) provided with an internal reader (RD) and an electronic circuit (3) linked to the PC. The circuit (3) includes a microprocessor (MP) capable of generating a random factor (RN). The circuit (3) also includes a startup circuit (MCD) generating a time delay period T, a security microcircuit (PSMC) and a blocking circuit (BBC). Between these elements, a cryptographic procedure, of the DES or DEA type, is effected which aims at establishing the consistency between a key (SK2I) associated with dedicated identity numbers (IN, OPN) of the smart card (CAM) and a key (SK2I') associated with a corresponding dedicated identity number (IN') of the PC in the PSMC. The system is automatically blocked in the case of inconsistency.

REFERENCES:
patent: 4935962 (1990-06-01), Austin
patent: 4965827 (1990-10-01), McDonald
patent: 5068894 (1991-11-01), Hoppe

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