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WEWORC
2007

132views Cryptology» more WEWORC 2007»

Towards a Concrete Security Proof of Courtois, Finiasz and Sendrier Signature Scheme

13 years 5 months ago

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

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14

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WEWORC
2007

148views Cryptology» more WEWORC 2007»

Preimages for Reduced-Round Tiger

13 years 5 months ago

Download www.cosic.esat.kuleuven.be

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

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15

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WEWORC
2007

129views Cryptology» more WEWORC 2007»

Cryptanalysis of Achterbahn-128/80 with a New Keystream Limitation

13 years 5 months ago

Download www.ecrypt.eu.org

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

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23

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WEWORC
2007

162views Cryptology» more WEWORC 2007»

New Attacks on the Stream Cipher TPy6 and Design of New Ciphers the TPy6-A and the TPy6-B

13 years 5 months ago

Download eprint.iacr.org

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

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