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693 résultats
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Séminaire
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Cryptographie
Designing and deploying post-quantum cryptography
Orateur : Jean-Philippe Aumasson - Teserakt AG
I will review the hash-based signature submitted to the NIST competition jointly with Guillaume Endignoux, discussing its assurance level and performance. Then I will discuss the challenges of deploying post-quantum cryptography in an end-to-end encryption product for machine-to-machine communications.<br/> lien: http://desktop.visio.renater.fr/scopia?ID=721783***6864&autojoin -
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Séminaire
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Cryptographie
Cryptography based on rank metric codes
Orateur : Nicolas Aragon - Université de Limoges, exceptionnellement salle Jersey à l'ISTIC
In the past few years, the interest for rank metric based cryptography has drastically increased, especially since the beginning of the NIST Post-Quantum Cryptography standardization process : five rank metric based proposals were submitted to the first round. This talk will present the different approaches and tradeoffs for building Key Encapsulation Mechanisms and Public Key Encryption schemes[…] -
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Séminaire
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Cryptographie
On the design and implementation of scalar multiplication algorithms
Orateur : Koray Karabina - Florida Atlantic University
Diffie-Hellman type key exchange protocols and standardized digital signature algorithms all benefit from efficient design and secure implementation of group exponentiation algorithms. This talk will focus on elliptic curve groups and scalar multiplication algorithms derived from differential addition chains. First, I will give a survey of algorithms, and then I will present some recent[…] -
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Séminaire
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Cryptographie
Approx-SVP in Ideal Lattices with Pre-processing
Orateur : Alice Pellet-Mary - ENS de Lyon
Finding a short non zero vector in an Euclidean lattice is a well-studied problem which has proven useful to construct many cryptographic primitives. The current best asymptotic algorithm to find a relatively short vector in an arbitrary lattice is the BKZ algorithm. This algorithm recovers a vector which is at most $2^{n^{\alpha}}$ times larger than the shortest non zero vector in time $2^{n^{1-[…] -
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Séminaire
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Cryptographie
Some new results on cube attacks against Trivium
Orateur : Tian Tian - Université de Zhengzhou
Trivium is a bit oriented synchronous stream cipher designed by Cannière and Preneel. It is one of the eSTREAM hardware-oriented finalists and an International Standard under ISO/IEC 29192-3:2012. Cube attacks are an important type of key recovery attack against Trivium. First, I will give a survey on cube attacks against Trivium. Second, I will present our recent results including an algebraic[…] -
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Séminaire
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Cryptographie
Cryptanalyse algébrique de DAGS
Orateur : Magali Bardet - université de Rouen
Elise Barelli et Alain Couvreur ont présenté une attaque dévastatrice sur le cryptosystème DAGS soumis au 1er tour de la compétition du NIST autour d'algorithmes de cryptographie post-quantiques. Je présenterai une explication précise de la résolution par bases de Gröbner de leur modélisation algébrique, expliquant l'efficacité de l'attaque pour les paramètres de DAGS publiés au NIST.<br/> lien:[…] -