[Resource Topic] 2007/141: Practical Cryptanalysis of SFLASH

Welcome to the resource topic for 2007/141

Title:
Practical Cryptanalysis of SFLASH

Authors: Vivien Dubois, Pierre-Alain Fouque, Adi Shamir, 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.

ePrint: https://eprint.iacr.org/2007/141

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