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Filtering-based CPA: a successful side-channel attack against desynchronization countermeasures

Abstract : Secure implementations against side channel attacks usually combine hiding and masking protections in software implementations. In this work, we focus on desynchronization protection which is considered as a hiding countermeasure. The idea of desynchronization is to obtain a non-predictable offset of the attacking point in terms of time dimension. For this purpose, we present exploiting pattern-recognition methods to filter interesting points for obtaining a successful side channel attack. Using this tool as a case study, we completely cancel the desynchronization effect of the CHES 2009/2010 countermeasure [2, 3]. Moreover, 25k traces are needed for a successful key recoveries in case of polymorphism-based countermeasure [4].
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Submitted on : Thursday, November 18, 2021 - 5:03:37 PM
Last modification on : Friday, November 26, 2021 - 12:04:53 PM


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Karim Moussa Ali Abdellatif, Damien Couroussé, Olivier Potin, Philippe Jaillon. Filtering-based CPA: a successful side-channel attack against desynchronization countermeasures. Fourth Workshop on Cryptography and Security in Computing Systems (CS2 '17), Jan 2017, Stockholm, Sweden. pp.29-32, ⟨10.1145/3031836.3031842⟩. ⟨emse-01490735⟩



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