1-round dynamic group key agreement
YE Cheng-qing · Journal of Zhejiang University(Engineering Science) · 2007
Among the conventional round group key agreement protocol,the minimal number of message exchange round is 2.The efficiency of the protocol is affected by the number of message exchange round.Using a secret shared technology that two parties share a common static secret without any interaction between them,an efficient one-round ID-based authenticated group key agreement scheme was proposed and extended to the dynamic group.The number of message exchanged during the key agreement in this one-round protocol is reduced to half of that in two-round protocols.So the efficiency of its communication is improved.The proposed scheme was proved to be secure and be forward and backward secure,and can be applied to the secure group communication where the perfect forward secure is not needed.