摘要： 针对Ad Hoc网络自组织、高动态等特点,提出一种更具鲁棒性的基于身份的Ad Hoc密钥管理方案。采用基于双线性对的公钥体制,保证密钥分发时用户和服务节点的双向认证。使用门限密码技术,实现分布式的密钥管理,避免单点失效问题。引入辅助节点,有效地解决因网络分割引起的密钥更新难题。该方案在保证密钥管理系统安全性的同时,减少了通信开销和存储开销。测试结果表明,该方案能完成密钥的更新,有效地增强密钥管理服务的鲁棒性。

关键词: Ad Hoc网络, 密钥管理, 双线性对, 门限密码, 辅助节点

Abstract: Based on the characteristics of Ad Hoc networks,such as self-organization and high mobility,a more robust identity-based key management scheme for Ad Hoc network is proposed.In the proposed scheme,the mutual authentication at the key distribution moment between the users and server nodes is provided through the public cryptosystem based on bilinear pairing.Threshold cryptography is used to realize distributed key management and avoid single point of failure.And the auxiliary nodes can effectively solve the key renewal problem which is caused by network partition.The proposed scheme guarantees the security of key management system,and reduces communication overhead and storage cost.Simulation results show that the scheme can not only complete renewal of the key reliably,but also enhance robustness of the key management service effectively.

Key words: Ad Hoc network, key management, bilinear pairing, threshold cryptography, auxiliary node

中图分类号: 

• TP393