自组网中一种新的组密钥更新策略

New Group Rekeying Scheme for Multicast in Ad Hoc Networks

组播是自组网应用中的一个重要组成部分,如何对组播通信中的密钥进行管理,使得密钥能够安全地分发和高效地更新是目前的一个研究热点。该文提出了一种新的组密钥更新策略。利用多个密钥池进行密钥预分发,建立对称密钥进行组密钥的更新,基于ID的密码系统,降低节点的计算量和通信量。该策略的安全模型符合主动外部攻击模型,满足强安全性。对新策略的安全和性能进行了详细的分析。

Multicast is one of the important components in Ad Hoc networks. Key management is the hotspot of study for secure group key distribution and efficient rckcying at present. A new group rckcying scheme is proposed, which uses multiple key pools in key prc-distribution phase and establishes pairwisc keys for group rckeying. The new scheme using identity-based cryptographic lowers the computational and communicational costs of nodes. And its security model adapts to the active outsider attack model and meets strong-security. This paper analyzes the new scheme in terms of network security and performance overhead.