Dynamic Group Diffie-Hellman Key Exchange under standard assumptions

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Description

Authenticated Diffie-Hellman key exchange allows two principals communicating over a public network, and each holding public-private keys, to agree on a shared secret value. In this paper we study the natural extension of this cryptographic problem to a group of principals. We begin from existing formal security models and refine them to incorporate major missing details (e.g., strong-corruption and concurrent sessions). Within this model we define the execution of a protocol for authenticated dynamic group Diffie-Hellman and show that it is provably secure under the decisional Diffie-Hellman assumption. Our security result holds in the standard model and thus provides better ... continued below

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16 pages

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Bresson, Emmanuel; Chevassut, Olivier & Pointcheval, David February 14, 2002.

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Description

Authenticated Diffie-Hellman key exchange allows two principals communicating over a public network, and each holding public-private keys, to agree on a shared secret value. In this paper we study the natural extension of this cryptographic problem to a group of principals. We begin from existing formal security models and refine them to incorporate major missing details (e.g., strong-corruption and concurrent sessions). Within this model we define the execution of a protocol for authenticated dynamic group Diffie-Hellman and show that it is provably secure under the decisional Diffie-Hellman assumption. Our security result holds in the standard model and thus provides better security guarantees than previously published results in the random oracle model.

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16 pages

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OSTI as DE00792949

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  • Eurocrypt 2002, Amsterdam (NL), 04/28/2002--05/02/2002

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  • Report No.: LBNL--49087
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 792949
  • Archival Resource Key: ark:/67531/metadc733837

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  • February 14, 2002

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • April 4, 2016, 12:43 p.m.

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Bresson, Emmanuel; Chevassut, Olivier & Pointcheval, David. Dynamic Group Diffie-Hellman Key Exchange under standard assumptions, article, February 14, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc733837/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.