DDH-based group key agreement in a mobile environment

Junghyun Nam, Jinwoo Lee, Seung-Joo Kim, Dongho Won

Research output: Contribution to journalArticle

50 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)73-83
Number of pages11
JournalJournal of Systems and Software
Volume78
Issue number1
DOIs
Publication statusPublished - 2005 Oct 1
Externally publishedYes

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Mobile devices
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Keywords

  • DDH assumption
  • Group key agreement
  • Mobile device
  • Multicast

ASJC Scopus subject areas

  • Computer Science Applications
  • Information Systems
  • Software

Cite this

DDH-based group key agreement in a mobile environment. / Nam, Junghyun; Lee, Jinwoo; Kim, Seung-Joo; Won, Dongho.

In: Journal of Systems and Software, Vol. 78, No. 1, 01.10.2005, p. 73-83.

Research output: Contribution to journalArticle

Nam, Junghyun ; Lee, Jinwoo ; Kim, Seung-Joo ; Won, Dongho. / DDH-based group key agreement in a mobile environment. In: Journal of Systems and Software. 2005 ; Vol. 78, No. 1. pp. 73-83.
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