摘要： 提出了一种无线Ad Hoc 网络组密钥协商和管理方案，协商过程不需网络有特定拓扑结构，节点间不需预先的共享信息，协商结构易于维护，满足Ad Hoc 网络无基础结构的特点和网络节点移动产生的密钥更新要求。分析表明，该方案充分考虑Ad Hoc 节点分布特点，密钥安全可靠，防止dominator 合谋攻击，密钥结构便于管理，节点间通信可靠迅速，减少了通信时延，密钥协商的通信量和计算量较已知协议有改进，适合于各类的无线Ad Hoc 网络。

关键词: Ad Hoc；CDS；密钥协商；密钥管理

Abstract: The paper proposes a group key agreement and management scheme for wireless Ad Hoc networks on the basis of the concept of CDS. The process of key agreement doesn’t demand any specific topology or previous shared information between nodes. The structure of key agreement can be maintained easily. Analysis shows that the scheme provides more reliable and quick communication, decrease the communication delay, produce better performance. And this scheme prevents the malicious attack raised by some dominators together. The scheme is suitable for Ad Hoc networks of any size.

Key words: Ad Hoc; Connected dominating set (CDS); Key agreement; Key management