SOSEMANUK: a fast software-oriented stream cipher

Come Berbain; Olivier Billet; Anne Canteaut; Nicolas Courtois; Henri Gilbert; Louis Goubin; Aline Gouget; Louis Granboulan; Cedric Lauradoux; Marine Minier; Thomas Pornin; Herve Sibert

arXiv · 0810.1858

SOSEMANUK: a fast software-oriented stream cipher

Come Berbain·Olivier Billet·Anne Canteaut·Nicolas Courtois·Henri Gilbert·Louis Goubin·Aline Gouget·Louis Granboulan·Cedric Lauradoux·Marine Minier·Thomas Pornin·Herve Sibert

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Abstract

Sosemanuk is a new synchronous software-oriented stream cipher, corresponding to Profile 1 of the ECRYPT call for stream cipher primitives. Its key length is variable between 128 and 256 bits. It ac- commodates a 128-bit initial value. Any key length is claimed to achieve 128-bit security. The Sosemanuk cipher uses both some basic design principles from the stream cipher SNOW 2.0 and some transformations derived from the block cipher SERPENT. Sosemanuk aims at improv- ing SNOW 2.0 both from the security and from the efficiency points of view. Most notably, it uses a faster IV-setup procedure. It also requires a reduced amount of static data, yielding better performance on several architectures.

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Come Berbain, Olivier Billet, Anne Canteaut, Nicolas Courtois, Henri Gilbert, Louis Goubin, Aline Gouget, Louis Granboulan, Cedric Lauradoux, Marine Minier, Thomas Pornin, Herve Sibert. 2008-10-10. SOSEMANUK: a fast software-oriented stream cipher. https://arxiv.org/abs/0810.1858

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