Method and system for protecting against side channel...

Details Method and system for protecting against side channel... Method and system for protecting against side channel...

2008-07-22

2008-07-22

Barron, Jr., Gilberto (Department: 2132)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

Tamper resistant

C708S492000, C380S030000

Reexamination Certificate

active

11144969

ABSTRACT:
A method and system for protecting against side channel attacks on cryptographic systems that attempt to recover information from externally detectable signals, such as electromagnetic fields or power input variations. A system operates in accordance with the subject invention to process a message using a cryptographic protocol involving a secret key d. The protocol includes a step for computing the result of iteratively performing a binary operation [op] on a digital quantity G, where a secret key d is taken as an integer value, such as elliptic curve scalar point multiplication or modular exponentiation.

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Pierre-Alain Fouque et. al.: “Defeating Countermeasures Based on Randomized BSD Representations” Lecture Notes in Computer Science, vol. 3156, Aug. 11, 2004, pp. 312-327, XP019009374.
Chevallier-Mames et. al.: “Low—Cost Solutions for Preventing Simple Side-Channel Analysis: Side-Channel Atomicity” IEEE Transactions on Computers, vol. 53, No. 6, Jun. 2004, pp. 760-768, XP002356344.
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Chevallier- Mames B: “Self-Randomized Exponentiation Algorithms” Lecture Notes in Computer Science, vol. 2964, Feb. 27, 2004 pp. 236-249, XP002297836.
Itoh K et al: “DPA Countermeasures By Improving the Window Method” Cryptographic Hardware and Embedded Systems. International Workshop, Aug. 13, 2002, pp. 303-317, XP001160529.

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