CSDL Home S SECURWARE 2009 2010 Fourth International Conference on Emerging Security Information, Systems and Technologies
June 18, 2009 to June 23, 2009
ID-based group key agreement (GKA) has been increasingly researched with the advantage of simple public key management. However, identities of group members can be exposed in the ID-based GKA protocol, so eavesdroppers can easily learn who belongs to the specific group. Recently, Wan et al. proposed a solution for this problem, an anonymous ID-based GKA protocol, which can keep group members’ anonymity to outside eavesdroppers; nevertheless, the protocol has some security flaws. This paper shows that Wan et al.’s GKA is insecure against colluding attack and their joining/leaving protocols do not guarantee forward and backward secrecy. We also propose a new forward secure ID-based GKA with anonymity from enhancing Wan et al.’s joining/leaving protocols. Our scheme provides forward and backward secrecy and is essentially just efficient as Wan et al.’s scheme.
ID-based, GKA, anonymous, forward-secure
Zeen Kim, Kwangjo Kim, "Forward Secure ID-Based Group Key Agreement Protocol with Anonymity", SECURWARE, 2009, 2010 Fourth International Conference on Emerging Security Information, Systems and Technologies, 2010 Fourth International Conference on Emerging Security Information, Systems and Technologies 2009, pp. 274-279, doi:10.1109/SECURWARE.2009.49