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WEWORC
2007
148views Cryptology» more  WEWORC 2007»
14 years 1 days ago
Preimages for Reduced-Round Tiger
The cryptanalysis of the cryptographic hash function Tiger has, until now, focussed on finding collisions. In this paper we describe a preimage attack on the compression function ...
Sebastiaan Indesteege, Bart Preneel
WEWORC
2007
132views Cryptology» more  WEWORC 2007»
14 years 1 days ago
Towards a Concrete Security Proof of Courtois, Finiasz and Sendrier Signature Scheme
Abstract. Courtois, Finiasz and Sendrier proposed in 2001 a practical code-based signature scheme. We give a rigorous security analysis of a modified version of this scheme in the...
Léonard Dallot
WEWORC
2007
162views Cryptology» more  WEWORC 2007»
14 years 1 days ago
New Attacks on the Stream Cipher TPy6 and Design of New Ciphers the TPy6-A and the TPy6-B
The stream ciphers Py, Pypy and Py6 were designed by Biham and Seberry for the ECRYPT-eSTREAM project in 2005. The ciphers were promoted to the ‘Focus’ ciphers of the Phase II ...
Gautham Sekar, Souradyuti Paul, Bart Preneel
WEWORC
2007
129views Cryptology» more  WEWORC 2007»
14 years 1 days ago
Cryptanalysis of Achterbahn-128/80 with a New Keystream Limitation
This paper presents two key-recovery attacks against the last modication to Achterbahn-128/80 proposed by the authors at SASC 2007 due to the previous attacks. The 80-bit variant,...
María Naya-Plasencia