627 results
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Nouveaux résultats en signature basée sur des codes correcteurs d'erreurs
Speaker : Pierre-Louis Cayrel - Limoges
Je présenterai dans un premier temps la cryptographie basée sur les codes correcteurs d'erreurs (schéma de McEliece, Niederreiter) puis je détaillerai le schéma d'identification et de signature de Stern présenté à CRYPTO en 1993 et le schéma de signature de Courtois-Finiasz-Sendrier (ASIACRYPT 2001). Je présenterai ensuite 3 travaux récents sur ce sujet :<br/> - une construction sécurisée du[…] -
Opérateurs arithmétiques et attaques matérielles
Speaker : Arnaud Tisserand - LIRMM
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New methods for digital generation and postprocessing of true random numbers
Speaker : Jovan Golic - Telecomitalia
Methods for true random number generation using logic gates only will be addressed. Advantages of the recently proposed Galois and Fibonacci ring oscillators will be pointed out. Methods for digital postprocessing of raw random sequences will also be discussed. -
Some formulae for Jacobians of curves
Speaker : Nicholas Shepherd-Barron - Cambridge University
We describe formulae for ratios of theta functions on the Jacobian A of a curve C, starting from equations defining C. We also give a projective description of the group law and multiplication on A. -
Pairings on elliptic curves
Speaker : Frederik Vercauteren - Katholieke Universiteit Leuven
In the past 5 years there has been an explosion of applications of pairings. In this talk we will describe a recent construction of a variant of the Tate pairing which results in a significant speed-up. Furthermore, we will elaborate on the status of pairing inversion and its implications on pairing based cryptography, but also finite field cryptography. -
Forward-Secure Signatures in Untrusted Update Environments:
Speaker : Benoit Libert - UCL
Forward-secure signatures (FSS) prevent forgeries for past time periods when an attacker obtains full access to the signer's storage. To simplify the integration of these primitives into standard security architectures, Boyen, Shacham, Shen and Waters recently introduced the concept of forward-secure signatures with untrusted updates where private keys are additionally protected by a second factor[…]