Practical Cryptanalysis of SFLASH

Vivien Dubois; Pierre-Alain Fouque; Adi Shamir; Jacques Stern

Paper 2007/141

Practical Cryptanalysis of SFLASH

Vivien Dubois, Pierre-Alain Fouque, Adi Shamir, and Jacques Stern

Abstract

In this paper, we present a practical attack on the signature scheme SFLASH proposed by Patarin, Goubin and Courtois in 2001 following a design they had introduced in 1998. The attack only needs the public key and requires about one second to forge a signature for any message, after a one-time computation of several minutes. It can be applied to both SFLASHv2 which was accepted by NESSIE, as well as to SFLASHv3 which is a higher security version.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: Cryptanalysis multivariate schemes
Contact author(s): Pierre-Alain Fouque @ ens fr
History: 2007-04-20: received
Short URL: https://ia.cr/2007/141
License: CC BY

BibTeX

@misc{cryptoeprint:2007/141,
      author = {Vivien Dubois and Pierre-Alain Fouque and Adi Shamir and Jacques Stern},
      title = {Practical Cryptanalysis of SFLASH},
      howpublished = {Cryptology ePrint Archive, Paper 2007/141},
      year = {2007},
      note = {\url{https://eprint.iacr.org/2007/141}},
      url = {https://eprint.iacr.org/2007/141}
}