移动自组网络安全分布式组密钥管理方案

组密钥管理通过为组成员生成、发送和更新组密钥来满足加密认证等安全需求,许多应用于军事战场、紧急救灾等场合的移动自组网络需要安全组通信支持.然而节点的移动性、链路的不稳定性以及缺乏可信中心等特点使移动自组网络组密钥管理面临巨大的挑战.基于可验证秘密分享机制和门限密码术,提出了一种安全的分布式组密钥管理方案VGK.方案能有效地抵制主动攻击和恶意节点的合谋攻击,而且具有鲁棒性和自适应性的特点.模拟实验表明,敌对环境下该方案中组密钥的更新效率和成功率均优于其它提出的协议.

Secure Distributed Group Key Management Scheme for MANET

Group key management is used for group members in group communication to generate, refresh and transfer keys which are used for encryption and authentication. Many mobile wireless applications for military battlefield and emergency situations depend upon secure group communications. But group key management in mobile ad hoc networks meets a great challenge because of mobility, limited power, unreliable multi-hop communication and lack of trusted center. Based on the verifiable secret sharing mechanism and threshold cryptography, a new secure distributed group key management scheme named VGK is proposed. The presented scheme can strongly resist active attacks and coalition of the adversaries, and can be robust and adaptive in a hostile environment as well as a friendly environment. Our simulation results show that, compared to the previous work, VGK is better in the group rekey success ratio and delay especially in a hostile environment.