无线Ad Hoc网络是一种移动、多跳、自组织、无中心的新型网络，因其具有很强的鲁棒性、抗毁性和组网迅速等特点而在军事以及商业领域都有广阔的应用前景。然而，其灵活特性又使其安全性面临着严峻的挑战。密钥管理是Ad Hoc网络安全的关键技术，文章提出了一种基于分簇结构的Ad Hoc密钥管理方案，方案使用了基于身份密码算法，有效地降低了移动终端计算、存储能力的需求和系统密钥管理的通信开销，通过引入密钥协商算法，有效地解决了端到端通信保密问题。% Wireless Ad Hoc network is a mobile, multi-hop, self-organized and centerless system, which has great applications in both military and commerce field due to its especial features such as robustness, survivability and can be put up quickly. However, its flexible features make security a challenge. Then, a robust key management scheme is necessary to ensure privacy protection in Ad Hoc networks. In this paper, a cluster-based key management scheme is presented, which greatly decreases the need of the ability for computation and storage of mobile terminals, as well as communication cost for system key management by using the identity-based cryptography. Additionally, this scheme solves the problem of security effectively by bringing in a key agreement algorithm.
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