Open problems related to algebraic attacks on stream ciphers

  • Authors:
  • Anne Canteaut

  • Affiliations:
  • INRIA – projet CODES, Le Chesnay, France

  • Venue:
  • WCC'05 Proceedings of the 2005 international conference on Coding and Cryptography
  • Year:
  • 2005

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Abstract

The recently developed algebraic attacks apply to all keystream generators whose internal state is updated by a linear transition function, including LFSR-based generators. Here, we describe this type of attacks and we present some open problems related to their complexity. We also investigate the design criteria which may guarantee a high resistance to algebraic attacks for keystream generators based on a linear transition function.