Cryptography – Key management – Having particular key generator
Reexamination Certificate
2011-08-16
2011-08-16
Truong, Thanhnga (Department: 2438)
Cryptography
Key management
Having particular key generator
C380S028000, C345S426000, C345S473000, C345S634000
Reexamination Certificate
active
08000473
ABSTRACT:
The method according to this invention concerns a method for automatically generating cryptographic algorithms with optional supplementary data, said algorithms comprising two different zones: external algorithm secrecy zone, in external parts of the algorithm exposed to side-channel analysis, and an internal purely cryptographic zone that is not exposed to side-channel analysis, such that in the algorithm secrecy zone, the code of the algorithm is locally made of random (or pseudo-random) and independent sequences of instructions and/or table-lookups chosen from some fixed set of instructions and random constants, with some fixed prescribed probability distribution, and such that the internal cryptographic security zone can be any cryptographic algorithm or method that handles algorithmic security only and does not have to be protected against side-channel attacks.
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Courtois Nicolas
Goubin Louis
Gemalto SA
Jansson Pehr B.
The Jansson Firm
Truong Thanhnga
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