Method and apparatus for the authentication of integrated...

Details Method and apparatus for the authentication of integrated... Method and apparatus for the authentication of integrated...

2005-01-25

2005-01-25

Caldwell, Andrew (Department: 2137)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S152000, C713S172000, C380S202000, C380S201000, C705S058000, C705S057000, C705S029000, C705S028000, C714S737000, C714S724000, C714S037000, C714S032000, C714S030000, C714S025000

Reexamination Certificate

active

06848049

ABSTRACT:
A method for the authentication of an integrated circuit in an application system comprises, for the integrated circuit: detecting an activation scenario, and then modifying at least one of its responses. The application system implements an application program which sends instructions to the integrated circuit. The activation scenario is contained in the sequence of instructions received from the application program. The modification causes no malfunction of the integrated circuit in the application system, and therefore does not put the integrated circuit out of operation. A complementary method for the application system comprises: detecting an activation scenario; measuring the response of the integrated circuit to the activation scenario; verifying the response if it has been modified correctly by the integrated circuit; and authenticating the integrated circuit if the response is verified.

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