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    Provably secure authenticated group Diffie-Hellman key exchange

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    Authenticated key-exchange protocols allow two participants A and B, communicating over a public network and each holding an authentication means to exchange a shared secret value. Methods designed to deal with this cryptographic problem ensure A (resp. B) that no other participants aside from B (resp. A) can learn any information about the agreed value and often also ensure A and B that their respective partner has actually computed this value. A natural extension to this cryptographic method is to consider a pool of participants exchanging a shared secret value and to provide a formal treatment for it. Starting from the famous two-party Diffie-Hellman (DH) key-exchange protocol and from its authenticated variants, security experts have extended it to the multiparty setting for over a decade and, in the past few years, completed a formal analysis in the framework of modern cryptography. The present paper synthesizes this body of work on the provably-secure authenticated group DH key exchange.

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    Description

    Title : Provably secure authenticated group Diffie-Hellman key exchange
    Author(s) : Emmanuel Bresson, Olivier Chevassut, David Pointcheval
    Abstract : Authenticated key-exchange protocols allow two participants A and B, communicating over a public network and each holding an authentication means to exchange a shared secret value. Methods designed to deal with this cryptographic problem ensure A (resp. B) that no other participants aside from B (resp. A) can learn any information about the agreed value and often also ensure A and B that their respective partner has actually computed this value. A natural extension to this cryptographic method is to consider a pool of participants exchanging a shared secret value and to provide a formal treatment for it. Starting from the famous two-party Diffie-Hellman (DH) key-exchange protocol and from its authenticated variants, security experts have extended it to the multiparty setting for over a decade and, in the past few years, completed a formal analysis in the framework of modern cryptography. The present paper synthesizes this body of work on the provably-secure authenticated group DH key exchange.
    Subject : unspecified
    Area : Other
    Language : English
    Year : 2007

    Affiliations ENS, Paris, France
    Journal : ACM Transactions on Information and System Security
    Volume : 10
    Issue : 3
    Pages : 10 - es
    Url : http://portal.acm.org/citation.cfm?doid=1266977.1266979
    Doi : 10.1145/1266977.1266979

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