Výsledky vyhledávání - "Nicolas T. Courtois"

A nonlinear invariant attack on T-310 with the original Boolean function

Autor: Nicolas T. Courtois

Publikováno v: Cryptologia. 45:178-192

There are numerous results on nonlinear invariant attacks on T-310. In all such attacks found so far, both the Boolean functions and the cipher wiring were contrived and chosen by the attacker. In ...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2378450c45a83357ffae47b0f662294a
https://doi.org/10.1080/01611194.2020.1736207

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Construction of a polynomial invariant annihilation attack of degree 7 for T-310

Autor: Matteo Abbondati, Aidan Patrick, Nicolas T. Courtois

Publikováno v: Cryptologia. 44:289-314

Cryptographic attacks are typically constructed by black-box methods and combinations of simpler properties, for example in [Generalised] Linear Cryptanalysis. In this article, we work with a more ...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53d49d7dd9fecb337c7812bf2942a7d3
https://doi.org/10.1080/01611194.2019.1706062

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Variable elimination strategies and construction of nonlinear polynomial invariant attacks on T-310

Autor: Marios Georgiou, Nicolas T. Courtois

Publikováno v: Cryptologia. 44:20-38

One of the major open problems in symmetric cryptanalysis is to discover new specific types of invariant properties for block ciphers. In this article, we study nonlinear polynomial invaria...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0764e385f1687819859172981001b0e6
https://doi.org/10.1080/01611194.2019.1650845

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How Many Weak-Keys Exist in T-310 ?

Autor: Matteo Scarlata, Marios Georgiou, Nicolas T. Courtois

Publikováno v: Tatra Mountains Mathematical Publications, 73 (1)

T-310 is an important Cold War cipher. The cipher is extremely complex and it outputs extremely few bits from the internal state. A recent paper [Courtois, N. T.: Decryption oracle slide attacks on T-310, Cryptologia, 42 (2018), no. 3, 191–204] sho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12d2a5e3e09876f4c57fe8713c2018a6
https://doi.org/10.2478/tmmp-2019-0006

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Slide attacks and LC-weak keys in T-310

Autor: Marios Georgiou, Nicolas T. Courtois, Matteo Scarlata

Publikováno v: Cryptologia. 43:175-189

T-310 is an important Cold War cipher (Cryptologia 2006). In a recent article (Cryptologia 2018), researchers show that, in spite of specifying numerous very technical requirements, the designers d...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1462c2831c224238bf0870a842aa4064
https://doi.org/10.1080/01611194.2018.1548392

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Linear cryptanalysis and block cipher design in East Germany in the 1970s

Autor: Maria-Bristena Oprisanu, Klaus Schmeh, Nicolas T. Courtois

Publikováno v: Cryptologia. 43:2-22

Linear cryptanalysis (LC) is an important codebreaking method that became popular in the 1990s and has roots in the earlier research of Shamir in the 1980s. In this article we show evidence...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56337b0110f42d9f4f704c71dd755d8c
https://doi.org/10.1080/01611194.2018.1483981

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Systematic Construction of Nonlinear Product Attacks on Block Ciphers

Autor: Matteo Abbondati, Nicolas T. Courtois, Marek Grajek, Hamy Ratoanina

Publikováno v: Lecture Notes in Computer Science ISBN: 9783030409203
ICISC

A major open problem in block cipher cryptanalysis is discovery of new invariant properties of complex type. Recent papers show that this can be achieved for SCREAM, Midori64, MANTIS-4, T-310 or for DES with modified S-boxes. Until now such attacks a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::981d0084be5d016dc47fc5d9b0ddaf87
https://doi.org/10.1007/978-3-030-40921-0_2

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Feistel ciphers in East Germany in the communist era

Autor: Klaus Schmeh, Jörg Drobick, Nicolas T. Courtois

Publikováno v: Cryptologia. 42:427-444

Feistel ciphers (balanced and unbalanced) represent the most popular symmetric cipher type in modern cryptography. The invention of Feistel ciphers is usually credited to IBM’s Horst Feistel, who c...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9a6fd943bd903cae59ac7627bd7fa95c
https://doi.org/10.1080/01611194.2018.1428835

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