title: A provably secure revocable ID-based authenticated group key exchange protocol with identifying malicious participants.
abstract: The existence of malicious participants is a major threat for authenticated group key exchange (AGKE) protocols. Typically, there are two detecting ways (passive and active) to resist malicious participants in AGKE protocols. In 2012, the revocable identity- (ID-) based public key system (R-IDPKS) was proposed to solve the revocation problem in the ID-based public key system (IDPKS). Afterwards, based on the R-IDPKS, Wu et al. proposed a revocable ID-based AGKE (RID-AGKE) protocol, which adopted a passive detecting way to resist malicious participants. However, it needs three rounds and cannot identify malicious participants. In this paper, we fuse a noninteractive confirmed computation technique to propose the first two-round RID-AGKE protocol with identifying malicious participants, which is an active detecting way. We demonstrate that our protocol is a provably secure AGKE protocol with forward secrecy and can identify malicious participants. When compared with the recently proposed ID/RID-AGKE protocols, our protocol possesses better performance and more robust security properties.
authors.affiliation: Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China ; Shenzhen Key Laboratory of Internet Information Collaboration, Shenzhen 518055, China.
authors.forename: Tsu-Yang
authors.identifier: 0000-0001-8970-2452
authors.initials: TY
authors.lastname: Wu
authors.affiliation: Department of Mathematics, National Changhua University of Education, Jin-De Campus, Changhua City 500, Taiwan.
authors.forename: Tung-Tso
authors.initials: TT
authors.lastname: Tsai
authors.affiliation: Department of Mathematics, National Changhua University of Education, Jin-De Campus, Changhua City 500, Taiwan.
authors.forename: Yuh-Min
authors.identifier: 0000-0003-0860-7766
authors.initials: YM
authors.lastname: Tseng
mesh_terms: D003195:Computer Communication Networks / Q000592:standards; D016494:Computer Security / Q000592:standards; D006801:Humans; D020407:Internet / Q000592:standards