Clock-Controlled Shift Registers and Generalized Geffe Key-Stream Generator

Authors:
Alexander Kholosha
Affiliations:
-
Venue:
INDOCRYPT '01 Proceedings of the Second International Conference on Cryptology in India: Progress in Cryptology
Year:
2001

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Abstract

In this paper we devise a generalization of the Geffe generator that combines more than three periodic inputs over GF(q). In particular, clock-controlled shift registers are suggested as inputs. The period and the linear complexity of the generated key-stream are estimated. We also prove some new results about the period of the sequence generated by a clock-controlled shift register.