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    Senior Research Fellow / David.Pointcheval@ens.fr

    ENS, Paris, France

    Security proofs for an efficient password-based key exchange

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    Password-based key exchange schemes are designed to provide entities communicating over a public network, and sharing a (short) password only, with a session key (e.g, the key is used for data integrity and/or confidentiality). The focus of the present paper is on the analysis of very ecient schemes that have been proposed to the IEEE P1363 Standard working group on password-based authenticated key-exchange methods, but for which actual security was an open problem. We analyze the AuthA key exchange scheme and give a complete proof of its security. Our analysis shows that the AuthA protocol and its multiple modes of operation are provably secure under the computational Die-Hellman intractability assumption, in both the random-oracle and the ideal-cipher models.

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    Description

    Title : Security proofs for an efficient password-based key exchange
    Author(s) : Emmanuel Bresson, Olivier Chevassut, David Pointcheval
    Abstract : Password-based key exchange schemes are designed to provide entities communicating over a public network, and sharing a (short) password only, with a session key (e.g, the key is used for data integrity and/or confidentiality). The focus of the present paper is on the analysis of very ecient schemes that have been proposed to the IEEE P1363 Standard working group on password-based authenticated key-exchange methods, but for which actual security was an open problem. We analyze the AuthA key exchange scheme and give a complete proof of its security. Our analysis shows that the AuthA protocol and its multiple modes of operation are provably secure under the computational Die-Hellman intractability assumption, in both the random-oracle and the ideal-cipher models.
    Subject : unspecified
    Area : Other
    Language : English
    Year : 2003

    Affiliations ENS, Paris, France
    Conference_title : Security
    Publisher : ACM Press
    City : New York, New York, USA
    Pages : 241 -
    Url : http://portal.acm.org/citation.cfm?doid=948109.948142
    Isbn : 1581137389
    Doi : 10.1145/948109.948142

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    David's Peer Evaluation activity

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