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Title:
An Algebraic Fault Attack on the LED Block Cipher
Authors: Philipp Jovanovic, Martin Kreuzer, Ilia Polian
Abstract:In this paper we propose an attack on block ciphers where we combine techniques derived from algebraic and fault based cryptanalysis. The recently introduced block cipher LED serves us as a target for our attack. We show how to construct an algebraic representation of the encryption map and how to cast the side channel information gained from a fault injection into polynomial form. The resulting polynomial system is converted into a logical formula in conjunctive normal form and handed over to a SAT solver for reconstruction of the secret key. Following this approach we were able to mount a new, successful attack on the version of LED that uses a 64-bit secret key, requiring only a single fault injection.
ePrint: https://eprint.iacr.org/2012/400
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