Security weakness in Ren et al.'s group key agreement scheme built on secure two-party protocols

Junghyun Nam; Seungjoo Kim; Dongho Won

Security weakness in Ren et al.'s group key agreement scheme built on secure two-party protocols

Junghyun Nam, Seungjoo Kim, Dongho Won

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A group key agreement protocol is designed to allow a group of parties communicating over an insecure, public network to agree on a common secret key. Recently, in WISA'04, Ren et al. proposed an efficient group key agreement scheme for dynamic groups, which can be built on any of secure two-party key establishment protocols. In the present work we study the main EGAKA-KE protocol of the scheme and point out a critical security flaw in the protocol. We show that the security flaw leads to a vulnerability to an active attack mounted by two colluding adversaries.

Original language	English
Title of host publication	Information Security Applications - 6th International Workshop, WISA 2005, Revised Selected Papers
Pages	1-9
Number of pages	9
Publication status	Published - 2005
Externally published	Yes
Event	6th International Workshop on Information Security Applications, WISA 2005 - Jeju Island, Korea, Republic of Duration: 2005 Aug 22 → 2005 Aug 24

Publication series

Name	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume	3786 LNCS
ISSN (Print)	0302-9743
ISSN (Electronic)	1611-3349

Other

Other	6th International Workshop on Information Security Applications, WISA 2005
Country/Territory	Korea, Republic of
City	Jeju Island
Period	05/8/22 → 05/8/24

Keywords

Collusion attack
Group key agreement
Key authentication

ASJC Scopus subject areas

Theoretical Computer Science
Computer Science(all)

Cite this

Nam, J., Kim, S., & Won, D. (2005). Security weakness in Ren et al.'s group key agreement scheme built on secure two-party protocols. In Information Security Applications - 6th International Workshop, WISA 2005, Revised Selected Papers (pp. 1-9). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 3786 LNCS).

Security weakness in Ren et al.'s group key agreement scheme built on secure two-party protocols. / Nam, Junghyun; Kim, Seungjoo; Won, Dongho.
Information Security Applications - 6th International Workshop, WISA 2005, Revised Selected Papers. 2005. p. 1-9 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 3786 LNCS).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Nam, J, Kim, S & Won, D 2005, Security weakness in Ren et al.'s group key agreement scheme built on secure two-party protocols. in Information Security Applications - 6th International Workshop, WISA 2005, Revised Selected Papers. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), vol. 3786 LNCS, pp. 1-9, 6th International Workshop on Information Security Applications, WISA 2005, Jeju Island, Korea, Republic of, 05/8/22.

Nam J, Kim S, Won D. Security weakness in Ren et al.'s group key agreement scheme built on secure two-party protocols. In Information Security Applications - 6th International Workshop, WISA 2005, Revised Selected Papers. 2005. p. 1-9. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)).

Nam, Junghyun ; Kim, Seungjoo ; Won, Dongho. / Security weakness in Ren et al.'s group key agreement scheme built on secure two-party protocols. Information Security Applications - 6th International Workshop, WISA 2005, Revised Selected Papers. 2005. pp. 1-9 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)).

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Security weakness in Ren et al.'s group key agreement scheme built on secure two-party protocols

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Keywords

ASJC Scopus subject areas

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