In 2008, Wan et al. presented an anonymous ID-based group key agreement scheme for wireless networks, for which they claim that it ensures anonymity and unlinkability of the group members, as well as forward and backward secrecy of the group session key. In this paper, we show that forward and backward secrecy do not hold for the protocol. We propose a correction that introduces a shielding factor that protects each member's input to the group key. we also introduce a new feature that assures the correctness of the key as computed by all group members. This results in an increased computation cost, due to extra public key operations, and a similar communication cost. We also show in which practical setting the protocol can be deployed. © 2011 Springer-Verlag Berlin Heidelberg.
CITATION STYLE
De Mulder, Y., Wouters, K., & Preneel, B. (2011). A privacy-preserving ID-based group key agreement scheme applied in VPAN. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 6543 LNCS, pp. 214–225). https://doi.org/10.1007/978-3-642-18381-2_18
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