针对Ad Hoc网络能源受限、动态变化的特性,提出一个基于身份的组密钥协商机制.该机制基于簇结构,允许同步执行基于对的多方密钥协商协议,从而使得簇成员数不影响密钥协商；密钥协商期间不需要交互,进而提供安全认证和动态性.在判定性双线性Diffie-Hellman( DBDH)问题下证明了该机制的语义安全性,并与已有方案在安全性、通信量和计算量方面进行了比较,结果表明所提机制在协商轮数和认证性方面具有优势.%In view of the characteristics of limited energy and dynamic change in Ad Hoc network, an identity-based group key agreement scheme was presented. The topology was in a structure composed by clusters, and allowed the synchronous execution of multi-party key agreement protocols based on pairings. The number of cluster members did not affect the key agreement, and it did not require interactivity during the key agreement. It provided the authentication and dynamics. In addition, the scheme was proved semantics secure under the Decisional Bilinear Diffie-Hellman (DBDH) problem. At last, compared with the previous schemes, the proposed scheme has advantages in terms of negotiation rounds and authentication.
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