Process for protecting components of smart or chip cards from fr

Details Process for protecting components of smart or chip cards from fr Process for protecting components of smart or chip cards from fr

1995-02-02

1997-07-01

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 23, 380 24, 235379, 235380, 257679, 257922, 902 25, 902 26, 902 29, H04L 932, H04L 900

Patent

active

056446381

ABSTRACT:
Process for protecting components of smart cards from fraudulent use, wherein the component is locked as long as an unlock order formed by a secret key has not been applied thereto, characterized in that it consists in writing in the component, at the time of its manufacture, a value and a result, the result being associated with the said value by a given algorithm and the secret key.

REFERENCES:
patent: 4453074 (1984-06-01), Weinsteiin
patent: 4471216 (1984-09-01), Herve
patent: 4734568 (1988-03-01), Watanabe
patent: 4910774 (1990-03-01), Barakat
patent: 4974193 (1990-11-01), Beutelspacher et al.
patent: 5442704 (1995-08-01), Holtey

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