Table masking for resistance to power analysis attacks

Details Table masking for resistance to power analysis attacks Table masking for resistance to power analysis attacks

2004-05-24

2010-12-07

Cervetti, David García (Department: 2436)

Cryptography

Particular algorithmic function encoding

C380S042000, C380S044000, C380S268000, C713S162000, C713S168000, C713S190000

Reexamination Certificate

active

07848514

ABSTRACT:
Tables are defined to permit output masking for table look-ups to be carried out to resist power analysis attacks on cryptographic operations. A set of individually defined random values is used to mask each entry in a substitution table, defining a masked substitution table. A mask table is also defined such that the values of each entry, masked with the corresponding random value, is the value of a fixed mask. The masked substitution tables and the mask tables may be used in cryptographic operations to permit the output of table look-ups to be masked, without directly using the fixed mask value in the computations of the cryptographic operations.

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