A New Cross-realm Group Password-based Authenticated Key Exchange Protocol

Recently, several group password-authenticated key exchange (GPAKE) protocols have been proposed, Byun and Wang et al also proposed different passwords group PAKE protocols successively, and the clients in their protocols were all in the same realm. However, in practice we also need to establish a s...

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Bibliographic Details
Main Authors: Qing Dai, Xiufeng Zhao, Qiuliang Xu, Han Jiang
Format: Conference Proceeding
Language:English
Subjects:
Computational efficiency
Cross-realm
Cryptography
Dictionaries
Group key exchange
Password authentication
Protocols
Resilience
Servers
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Summary:Recently, several group password-authenticated key exchange (GPAKE) protocols have been proposed, Byun and Wang et al also proposed different passwords group PAKE protocols successively, and the clients in their protocols were all in the same realm. However, in practice we also need to establish a secure communication channel between groups who are in different realms. So, we proposed a cross-realm group PAKE protocol using different passwords. The proposed protocol extends Wang's GPAKE protocol from single realm to two realms, it enables groups in different realms to agree on a common group session key with the help of servers. We also gave the security analysis and computational costs for our protocol.
DOI:10.1109/CIS.2011.193