基于组密钥序列卫星网络组密钥协商协议

组密钥的协商是实现卫星网络安全组播通信的一个关键环节。为降低组密钥协商过程的计算及通信开销，针对卫星网络拓扑结构的动态变化问题，基于组密钥序列给出了组控制节点切换方法，实现了对组控制节点的动态调整；引入认证与完整性校验机制，提出了一种组密钥产生与更新机制，提高了密钥协商信息的安全性。仿真分析表明，该卫星网络组密钥协商协议具有较高的效率与安全性。

Group key agreement and rekeying scheme in satellite network based on group key sequence

Group key agreement is one of the important stages to carry out secure multicast communication.A group controller node switch method was given pointing to the problem of satellite network topology changed dynamically.It could adjust controlling nodes in a dynamic way.Then,both authentication and integrality mechanism were used to attest agreement messages and group keys,a group key generation and renewing method was proposed,which could improve security of agreement messages.The results of simulation and analysis show that this group key agreement protocol leads to high efficiency and security.