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644 résultats

    • Séminaire

    • Cryptographie

    Research on Cryptographic Algorithms: beyond triple-DES, AES and RSA

    • 22 novembre 2002

    • IRMAR - Université de Rennes - Campus Beaulieu Bat. 22, RDC, Rennes - Amphi Lebesgue

    Orateur : Bart Preneel - University of Leuven

    In this talk we discuss the state of the art and progress in cryptographic algorithms such as encryption algorithms and digital signature techniques. We present at a high level the challenges to the designers (and users) of cryptographic algorithms and we discuss the major components of the solution, that is, research, standardization, and open evaluation. We also discuss the status of the NESSIE[…]

    • Séminaire

    • Cryptographie

    Monsky-Washnitzer Cohomology and Computing Zeta Functions

    • 31 mai 2002

    • IRMAR - Université de Rennes - Campus Beaulieu Bat. 22, RDC, Rennes - Amphi Lebesgue

    Orateur : Kiran Kedlaya - Berkeley

    Monsky-Washnitzer cohomology is a p-adic cohomology theory for algebraic varieties over finite fields, based on algebraic de Rham cohomology. Unlike the l-adic (etale) cohomology, it is well-suited for explicit computations, particularly over fields of small characteristic. We describe how to use Monsky-Washnitzer to construct efficient algorithms for computing zeta functions of varieties over[…]
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