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A new distinguisher for clock controlled stream ciphers

Publiceringsår: 2005
Språk: Engelska
Sidor: 181-195
Publikation/Tidskrift/Serie: Lecture Notes in Computer Science
Volym: 3557
Dokumenttyp: Artikel
Förlag: Springer


In this paper we present a distinguisher targeting towards irregularly clocked filter generators. The attack is applied on the irregularly. clocked stream cipher called LILI-II. LILI-II is the successor of the cipher LILI-128 and its design was published in [1]. There have been no known attacks better than exhaustive key search on LILI-II. Our attack is-the first of this kind that distinguishes the cipher output from a random source using 2(103) bits of keystream using computational complexity of approximately 2(103) operations.



  • Technology and Engineering


  • ISSN: 0302-9743

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