On the rate of coincidence of two clock-controlled combiners

Authors:
Xuexian Hu;Yongtao Ming;Wenfen Liu;Shiqu Li
Affiliations:
Department of Applied Mathematics, Information Engineering University, Zhengzhou, P.R. China;Department of Applied Mathematics, Information Engineering University, Zhengzhou, P.R. China;Department of Applied Mathematics, Information Engineering University, Zhengzhou, P.R. China;Department of Applied Mathematics, Information Engineering University, Zhengzhou, P.R. China
Venue:
Inscrypt'06 Proceedings of the Second SKLOIS conference on Information Security and Cryptology
Year:
2006

Citing 3
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Abstract

Clock-Controlled combiner is a common type of keystream generator for stream cipher applications. In this paper, we introduce a kind of probabilistic model for two clock-controlled combiners, and then study the rate of coincidence between the output sequences of these generators and corresponding LFSRs' sequences. The analysis conducted indicates that these two combiners may be vulnerable to the correlation attacks.