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Concept

Attaque par clé apparentée

Publications associées (29)

Algebraic, AIDA/Cube and Side Channel Analysis of KATAN Family of Block Ciphers

Pouyan Sepehrdad, Jorge Nakahara

This paper presents the first results on AIDA/cube, algebraic and side-channel attacks on variable number of rounds of all members of the KATAN family of block ciphers. Our cube attacks reach 60, 40 and 30 rounds of KATAN32, KATAN48 and KATAN64, respective ...

Springer2010

Efficient Cache Attacks on AES, and Countermeasures

Dag Arne Osvik

We describe several software side-channel attacks based on inter-process leakage through the state of the CPU's memory cache. This leakage reveals memory access patterns, which can be used for cryptanalysis of cryptographic primitives that employ data-depe ...

Springer Verlag2010

Discovery and Exploitation of New Biases in RC4

Serge Vaudenay, Pouyan Sepehrdad, Martin Vuagnoux

In this paper, we present several weaknesses in the stream cipher RC4. First, we present a technique to automatically reveal linear correlations in the PRGA of RC4. With this method, 48 new exploitable correlations have been discovered. Then we bind these ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2010

Computer Aided Cryptanalysis from Ciphers to Side Channels

Martin Vuagnoux

In this dissertation, we study the security of cryptographic protocols and cryptosystems from the mathematical definition of the primitives, up to their physical implementations in the real world. We propose a representation of the chronological design usi ...

EPFL2010

Advanced Differential-Style Cryptanalysis of the NSA's Skipjack Block Cipher

Skipjack is a block cipher designed by the NSA for use in US government phones, and commercial mobile and wireless products by ATT. Among its initial implementations in hardware were the Clipper chip and Fortezza PC cards, which have since influenced the p ...

2009

Lightweight Block Ciphers Revisited: Cryptanalysis of Reduced Round PRESENT and HIGHT

Onur Özen

Design and analysis of lightweight block ciphers have become more popular due to the fact that the future use of block ciphers in ubiquitous devices is generally assumed to be extensive. In this respect, several lightweight block ciphers are designed, of w ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2009

Improved Cryptanalysis of Skein

Onur Özen, Jean-Philippe Aumasson

The hash function Skein is the submission of Ferguson et al. to the NIST Hash Competition, and is arguably a serious candidate for selection as SHA-3. This paper presents the first third-party analysis of Skein, with an extensive study of its main componen ...

Springer Berlin Heidelberg2009

Cryptanalysis of the ISDB Scrambling Algorithm (MULTI2)

Pouyan Sepehrdad, Jorge Nakahara, Jean-Philippe Aumasson

MULTI2 is the block cipher used in the ISDB standard for scrambling digital multimedia content. MULTI2 is used in Japan to se- cure multimedia broadcasting, including recent applications like HDTV and mobile TV. It is the only cipher speciﬁed in the 2007 J ...

Springer2009

Cryptanalysis of the full MMB Block Cipher

Jorge Nakahara

The block cipher MMB was designed by Daemen, Govaerts and Vandewalle, in 1993, as an alternative to the IDEA block cipher. We exploit and describe unusual properties of the modular multiplication in ZZ232 −1 , which lead to a diﬀerential attack on the full ...

Springer2009

Publications associées (29)