07085378 is referenced by 2 patents and cites 6 patents.

The invention concerns a countermeasure method in an electronic component using a secret key K cryptographic algorithm with sixteen computing cycles to supply an encrypted message (C) from an input message (M), each cycle using first means TC0 to supply an output information from an input information, Said method consists in applying by selection a sequence with the first means or another sequence with other means TC1, TC2 to a group G1 comprising the first three cycles at least and another group G4 comprising the last three cycles at least. Whatever the sequence, the output result of the last cycle of each group is the same for the same input message (M).

Title
Countermeasure method in an electronic component using a secret key cryptographic algorithm
Application Number
9/807615
Publication Number
7085378 (B1)
Application Date
September 15, 1999
Publication Date
August 1, 2006
Inventor
Olivier Benoit
Aubagne
FR
Christophe Clavier
Gemenos
FR
Agent
Buchanan Ingersoll PC
Assignee
GEMPLUS
FR
IPC
H04L 9/00
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