Breaking an Identity-Based Encryption Scheme Based on DHIES

  • Martin R. Albrecht
  • Kenneth G. Paterson
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7089)


We present collusion attacks against a recently proposed IBE scheme of Chen et al. from ASIACCS 2010. The attacks recover the master secret key of the scheme and thereby invalidate the existing security analysis of this scheme. The attacks are flexible, allowing, for example, the amount of computation needed to be traded-off against the size of the collusion.


identity-based encryption cryptanalysis Gröbner bases 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Martin R. Albrecht
    • 1
    • 2
  • Kenneth G. Paterson
    • 3
  1. 1.INRIA, Paris-Rocquencourt Center, SALSA Project UPMC Univ Paris 06, UMR 7606, LIP6ParisFrance
  2. 2.CNRS, UMR 7606, LIP6ParisFrance
  3. 3.Information Security Group, Royal HollowayUniversity of LondonFrance

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