A note on fast algebraic attacks and higher order nonlinearities

  • Authors:
  • Qichun Wang;Thomas Johansson

  • Affiliations:
  • The Shanghai Key Lab of Intelligent Information Processing, School of Computer Science, Fudan University, Shanghai, P.R. China and Dept. of Electrical and Information Technology, Lund University, ...;Dept. of Electrical and Information Technology, Lund University, Lund, Sweden

  • Venue:
  • Inscrypt'10 Proceedings of the 6th international conference on Information security and cryptology
  • Year:
  • 2010

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Abstract

In this note, we deduce a bound between fast algebraic immunity and higher order nonlinearity (it is the first time that a bound between these two cryptographic criteria is given), and find that a Boolean function should have high r-order nonlinearity to resist fast algebraic attacks. As a corollary, we find that no matter how much effort we make, the Tu-Deng functions cannot be repaired in a standard way to behave well against fast algebraic attacks. Therefore, we should give up repairing this class of Boolean functions and try to find other classes of functions with good cryptographic properties or to prove that the Carlet-Feng function behaves well.