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SOSEMANUK
From Wikipedia, the free encyclopedia
SOSEMANUK is a synchronous stream cipher developed by Come Berbain, Olivier Billet, Anne Canteaut, Nicolas Courtois, Henri Gilbert, Louis Goubin, Aline Gouget, Louis Granboulan, Cédric Lauradoux, Marine Minier, Thomas Pornin and Hervé Sibert. The cipher is an eSTREAM cipher candidate.
The cipher key length can vary between 128 and 256 bits, but the guaranteed security is only 128 bits. The cipher uses an initial vector of 128 bits.
According to the authors of SOSEMANUK, the structure of the cipher is influenced by the stream cipher SNOW and the block cipher Serpent. The cipher has an improved performance compared with Snow, more specifically by having a faster initialization phase.
During the eSTREAM Phase 1 evaluation process two weaknesses in SOSEMANUK were discovered. SOSEMANUK has still been selected as a Profile 1, Phase 2 Focus candidate by the eSTREAM project. It is not patented.
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