A Multi-Party Key Agreement Protocol Withstand Interrupted Attack
Zhu Jianhua · Dianzi xuebao · 2008
A non-authenticated group key agreement protocol cannot provide participant and message authentication,thus it must depend on an authenticated network channel or use another scheme to provide authentication.This paper indicates that Horng's group key agreement protocol which based on the authenticated broadcast channel is unable to withstand the disruption attack of malicious participants in group.This attack leads that other honest participants will not be able to correctly agree on a group key consistently.In this paper,an improved protocol is proposed.The proposed protocol which joins the message authentication method in original protocol can detect the malicious participant.Under the random oracle model,paper proves the proposed protocol can withstand the interrupted attack from malicious participant.