摘要：

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。

关键词: 自组网, 组播, 密钥管理, 组密钥更新

Abstract: 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 rekeying at present. A new group rekeying scheme is proposed, which uses multiple key pools in key pre-distribution phase and establishes pairwise keys for group rekeying. 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.

Key words: Ad Hoc networks, multicast, key management, group rekeying

中图分类号: 

• TP393