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» Block Ciphers and Systems of Quadratic Equations
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FSE
2003
Springer
152views Cryptology» more  FSE 2003»
13 years 9 months ago
Block Ciphers and Systems of Quadratic Equations
Abstract. In this paper we compare systems of multivariate polynomials, which completely define the block ciphers Khazad, Misty1, Kasumi, Camellia, Rijndael and Serpent in the vie...
Alex Biryukov, Christophe De Cannière
DAGSTUHL
2007
13 years 6 months ago
How Fast can be Algebraic Attacks on Block Ciphers?
In this paper we give a specification of a new block cipher that can be called the Courtois Toy Cipher (CTC). It is quite simple, and yet very much like any other known block ciph...
Nicolas Courtois
EUROCRYPT
2006
Springer
13 years 8 months ago
QUAD: A Practical Stream Cipher with Provable Security
We introduce a practical synchronous stream cipher with provable security named QUAD. The cipher relies on the iteration of a multivariate quadratic system of m equations in n <...
Côme Berbain, Henri Gilbert, Jacques Patarin
INDOCRYPT
2010
Springer
13 years 2 months ago
Algebraic, AIDA/Cube and Side Channel Analysis of KATAN Family of Block Ciphers
Abstract. This paper presents the first results on AIDA/cube, algebraic and sidechannel attacks on variable number of rounds of all members of the KATAN family of block ciphers. Ou...
Gregory V. Bard, Nicolas Courtois, Jorge Nakahara,...
IMA
2007
Springer
137views Cryptology» more  IMA 2007»
13 years 10 months ago
Algebraic Cryptanalysis of the Data Encryption Standard
In spite of growing importance of AES, the Data Encryption Standard is by no means obsolete. DES has never been broken from the practical point of view. The triple DES is believed ...
Nicolas Courtois, Gregory V. Bard