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Erschienen in:
2001 | OriginalPaper | Buchkapitel
Randomized Addition-Subtraction Chains as a Countermeasure against Power Attacks
verfasst von : Elisabeth Oswald, Manfred Aigner
Erschienen in: Cryptographic Hardware and Embedded Systems — CHES 2001
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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Power Analysis attacks on elliptic curve cryptosystems and various countermeasures against them, have been first discussed by Coron ([6]). All proposed countermeasures are based on the randomization or blinding of the inputparameters of the binary algorithm. We propose a countermeasure that randomizes the binary algorithm itself. Our algorithm needs approximately 9% more additions than the ordinary binary algorithm, but makes power analysis attacks really difficult.