Chang Xu, Hua Guo, Zhoujun Li and Yi Mu New construction of affiliation-hiding authenticated group key agreement Security and Communication Networks 6
In this paper, we show that Jarecki, Kim, and Tsudik's affiliation-hiding authenticated group key agreement protocols in CT-RSA 2007 have some drawbacks. We introduce the notion of affiliation-hiding authenticated asymmetric group key agreement (AH-AAGKA) and present an AH-AAGKA protocol. Compared with previous AH-AGKA protocols, if invalid players participate in our protocol, legitimate participants can identify these invalid players. Besides, our protocol holds perfect forward secrecy, and linkable affiliation-hiding property.
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