Science China Information Sciences

, Volume 53, Issue 4, pp 760–768 | Cite as

A new perturbation algorithm and enhancing security of SFLASH signature scheme

  • HouZhen Wang
  • HuanGuo Zhang
  • HaiMing Guan
  • HaiQing Han
Research Papers
First Online:
Received:
Accepted:

Abstract

This paper introduces the concept of noise factor and noise operation, and constructs a noise group. We present a new perturbation algorithm for enhancing security of multivariate public key cryptosystems (MPKCs). European Consortium SFLASH which derives from Matsumoto-Imai scheme is a fast signature scheme intended for low cost smart cards. It was broken with the differential cryptanalysis by Dubois et al. in 2007. Taking Matsumoto-Imai system as an example, security analysis shows that the new algorithm can powerfully demolish its potential mathematical properties of the public key, and effectively avoid differential cryptanalysis without lowering the efficiency of the original algorithm.

Keywords

SFLASH differential cryptanalysis noise factor noise operation noise group 
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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • HouZhen Wang
    • 1
    • 2
  • HuanGuo Zhang
    • 1
    • 2
  • HaiMing Guan
    • 3
  • HaiQing Han
    • 1
    • 2
  1. 1.The Key Laboratory of Aerospace Information Security and Trusted Computing, Ministry of EducationWuhan UniversityWuhanChina
  2. 2.School of ComputerWuhan UniversityWuhanChina
  3. 3.Chinese Electronic Equipment System CorporationBeijingChina

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