Paper 2004/127

DDH-based Group Key Agreement in a Mobile Environment

Junghyun Nam, Jinwoo Lee, Seungjoo Kim, and Dongho Won

Abstract

A group key agreement protocol is designed to efficiently implement secure multicast channels for a group of parties communicating over an untrusted, open network by allowing them to agree on a common secret key. In the past decade many problems related to group key agreement have been tackled and solved (diminished if not solved), and recently some constant-round protocols have been proven secure in concrete, realistic setting. However, all forward-secure protocols so far are still too expensive for small mobile devices. In this paper we propose a new constant-round protocol well suited for a mobile environment and prove its security under the Decisional Diffie-Hellman assumption. The protocol meets simplicity, efficiency, and all the desired security properties.

Metadata
Available format(s)
PDF PS
Category
Cryptographic protocols
Publication info
Published elsewhere. Unknown where it was published
Keywords
group key agreementmulticastsecurity modelDDH
Contact author(s)
jhnam @ dosan skku ac kr
History
2004-12-08: last of 2 revisions
2004-06-03: received
See all versions
Short URL
https://ia.cr/2004/127
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2004/127,
      author = {Junghyun Nam and Jinwoo Lee and Seungjoo Kim and Dongho Won},
      title = {{DDH}-based Group Key Agreement in a Mobile Environment},
      howpublished = {Cryptology {ePrint} Archive, Paper 2004/127},
      year = {2004},
      url = {https://eprint.iacr.org/2004/127}
}
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