METHOD AND MODULE FOR RENEWING THE CODE OF A CRYPTOGRAPHIC ALGORITHM, METHOD AND MODULE FOR GENERATING A SEED, SECURITY PROCESSOR AND RECORDING CARRIER FOR THESE METHODS

METHOD AND MODULE FOR RENEWING THE CODE OF A CRYPTOGRAPHIC ALGORITHM, METHOD AND MODULE FOR GENERATING A SEED, SECURITY PROCESSOR AND RECORDING CARRIER FOR THESE METHODS

This method for renewing the code of an algorithm comprises: receiving (122) a randomly drawn seed whose size in terms of number of bits, is at least four times smaller than the number of bits needed to encode the N numerical constants of the cryptographic algorithm, expanding (128) the seed determi...

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1. Verfasser: SOQUET PATRICK
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Zusammenfassung:This method for renewing the code of an algorithm comprises: receiving (122) a randomly drawn seed whose size in terms of number of bits, is at least four times smaller than the number of bits needed to encode the N numerical constants of the cryptographic algorithm, expanding (128) the seed deterministically to obtain a sequence of numbers whose size, in number of bits, is at least equal to the number of bits needed to encode the N numerical constants of the cryptographic algorithm, generating (132) N new numerical constants from the sequence of numbers obtained, and replacing (134) the N constants of the code of the cryptographic algorithm by the N new constants generated to obtain the code of a renewed cryptographic algorithm.