对于部署在开放式网络环境下的分布式协同应用来说，在某些环境下参与应用的用户可能随时加入或离开由多方用户组成的一个群组，这种成员关系的动态性使得分布式网络环境下的协同应用对群组通信系统的安全性提出了更高的要求和挑战。基于标识的密码技术和门限密码技术，提出一种安全的分布式组密钥管理方案。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。%For the distributed collaborative applications deployed in an open network environment , in some circumstances the users partici-pating in the application may join or leave a group consisting of multi-user at any time , such dynamic nature of membership leads to higher re-quirements and challenges in security of group communication system for collaborative applications in distributed network environment .Based on identity cryptography mechanism and threshold cryptography , a new secure distributed group key management scheme is proposed .The presented scheme can strongly resist active attacks and the coalition attacks from malicious adversaries , and with the features of robustness and adaptiveness .
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