Return-map cryptanalysis revisited

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

29 Scopus Citations
View graph of relations

Author(s)

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)1557-1568
Journal / PublicationInternational Journal of Bifurcation and Chaos
Volume16
Issue number5
Publication statusPublished - May 2006

Abstract

As a powerful cryptanalysis tool, the method of return-map attacks can be used to extract secret messages masked by chaos in secure communication schemes. Recently, a simple defensive mechanism was presented to enhance the security of chaotic parameter modulation schemes against return-map attacks. Two techniques are combined in the proposed defensive mechanism: Multistep parameter modulation and alternative driving of two different transmitter variables. This paper restudies the security of this proposed defensive mechanism against return-map attacks, and points out that the security was much over-estimated in the original publication for both ciphertext-only attack and known/chosen-plaintext attacks. It is found that a deterministic relationship exists between the shape of the return map and the modulated parameter, and that such a relationship can be used to dramatically enhance return-map attacks thereby making them quite easy to break the defensive mechanism. © World Scientific Publishing Company.

Research Area(s)

  • Chaos encryption, Cryptanalysis, Lorenz system, Return map, Secure communication

Citation Format(s)

Return-map cryptanalysis revisited. / Li, Shujun; Chen, Guanrong; Álvarez, Gonzalo.

In: International Journal of Bifurcation and Chaos, Vol. 16, No. 5, 05.2006, p. 1557-1568.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review