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Title:
Decimation Attack of Stream Ciphers
Authors: Eric FILIOL
Abstract:This paper presents a new attack called {\em Decimation Attack}
of most stream ciphers. It exploits the property that multiple clocking
(or equivalently d-th decimation) of a LFSR can simulate the behavior
of many other LFSRs of possible shorter length. It yields then significqnt
improvements of all the previous known correlation and fast correlation attacks
provided a new criterion is satisfied. This criterion on the length of the feedback
polynomial is then defined to resist the decimation attack. Simulation results and
complexity comparison are detailed for ciphertext only attack.
ePrint: https://eprint.iacr.org/2000/040
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