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Published in:
2007 | OriginalPaper | Chapter
Infringing Key Authentication of an ID-Based Group Key Exchange Protocol Using Binary Key Trees
Authors : Junghyun Nam, Juryon Paik, Youngsook Lee, Jin Kwak, Ung Mo Kim, Dongho Won
Published in: Knowledge-Based Intelligent Information and Engineering Systems
Publisher: Springer Berlin Heidelberg
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Group key exchange protocols allow a group of parties communicating over a public network to come up with a common secret key called a session key. Due to their critical role in building secure multicast channels, a number of group key exchange protocols have been suggested over the years for a variety of settings. Among these is the ID-based group key exchange protocol proposed by Yang and Shieh in 2001. In this paper, we revisit the Yang-Shieh ID-based protocol and conduct a security analysis on the protocol. The consequence of our analysis is that the Yang-Shieh protocol fails to achieve its basic goal of securely establishing a session key among the intended parties. This is shown via a collusion attack on the protocol. We also show how to fix the security problem with the protocol.