Welcome to the resource topic for 2003/229
Title:
Algebraic Attacks on Summation Generators
Authors: Dong Hoon Lee, Jaeheon Kim, Jin Hong, Jae Woo Han, Dukjae Moon
Abstract:We apply the algebraic attacks
on stream ciphers with memories to the summation generator.
For a summation generator that uses n LFSRs, the
algebraic equation relating the key stream bits
and LFSR output bits
can be made to be of degree less than or equal to
2^{\lceil\log_2 n \rceil}, using \lceil\log_2 n \rceil + 1
consecutive key stream bits.
This is much lower than the upper bound given by
previous general results.
ePrint: https://eprint.iacr.org/2003/229
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