Probabilistic Factors in the Sober-t Stream Ciphers

S. Babbage,Joseph Lano,Kasteelpark Arenberg

semanticscholar（2002）

katholieke universiteit leuven

被引用25|浏览6

摘要

Sober-t16 and Sober-t32 are two synchronous stream ci- phersdevelopedbyG.RoseandP.HawkesandsubmittedtotheNESSIE competition.Inthispaperweshowhowaprobabilisticfactorinthede- signcanbeexploited.AGuessandDetermineattackismountedagainst Sober-tw.Forunstuttered Sober-t32,thisattackismoree-cientthan exhaustive key search. Keywords:NESSIE,Cryptanalysis,SecurityEvaluation, Sober-tw,Guess andDetermine attack.

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