International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 20 April 2014

Sandip Karmakar, Dipanwita Roy Chowdhury
ePrint Report ePrint Report
In this paper, we present fault attack on Grain family of stream ciphers, an eStream finalist. The earlier fault attacks on Grain work on LFSR whereas our target for fault induction is the NFSR. Our attack requires a small number of faults to be injected; 150 only for Grain v1 and only 312 and 384 for Grain-128 and Grain-128a, respectively. The number of faults are much lesser than the earlier reported fault attacks; 1587 for Grain-128 and 1831 for Grain-128a.

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