Grain-128a: a new version of Grain-128 with optional authentication

  • Authors:
  • Martin Ågren;Martin Hell;Thomas Johansson;Willi Meier

  • Affiliations:
  • Department of Electrical and Information Technology, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden;Department of Electrical and Information Technology, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden;Department of Electrical and Information Technology, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden;FHNW Hochschule für Technik, Klosterzelgstr, CH-5210 Windisch, Switzerland

  • Venue:
  • International Journal of Wireless and Mobile Computing
  • Year:
  • 2011

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Abstract

A new version of the stream cipher Grain-128 is proposed. The new version, Grain-128a, is strengthened against all known attacks and observations on the original Grain-128, and has built-in support for optional authentication. The changes are modest, keeping the basic structure of Grain-128. This gives a high confidence in Grain-128a and allows for easy updating of existing implementations.