关键词: 密码学, 群组密钥协商, 可容错性, 可扩展性

Abstract: Group Key Agreement (GKA) is one of the important methods to ensure the subsequent secure communication. A new group key agreement protocol was proposed in this paper. In this protocol, the participants could verify the honesty of other participants by a series of algorithms. The new protocol realized the secure session key agreement with lower computational cost. In addition, it has the fault-tolerance property and the long term key-reuse property. The performance analysis results show that this protocol can resist many common attacks.

Key words: cryptography, Group Key Agreement (GKA), fault-tolerance, expandability