Cryptographic revocation method using a chip card

Details Cryptographic revocation method using a chip card Cryptographic revocation method using a chip card

2008-04-08

2008-04-08

Moazzami, Nasser (Department: 2136)

Information security

Access control or authentication

Stand-alone

C713S172000

Reexamination Certificate

active

10501823

ABSTRACT:
A cryptographic method and a chip card which is used to carry out the method. Before any calculation is performed by a computing means of the chip card, the chip card reads (2) an integral list, in a storage means of a second entity, of identifiers of first proprietary entities of a chip card. Such list is linked to each status assigned to each of the first entities by the second entity. Subsequently, the chip card compares (3) the identifier stored in a storage means of the chip card with the contents of the list, in order to authorize (5) or prohibit (4) any calculation by the computing means depending on the result of the comparison.

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