中文摘要：

提出一种适于大规模群组Ad hoc网络的组密钥管理方案。该方案基于地理位置建立了分层分组的网络模型,将大部分消息的传输距离限制在一个小组范围内,降低了通信开销,结合密钥分发和密钥协商的各自优点来生成、分发和更新组密钥,在避免单点失效的同时提高了效率;同时,椭圆曲线上的离散对数难题保证了方案的安全性。分析表明方案具有较强的可用性。

英文摘要：

This paper proposed a new hierarchical group key management scheme for large Ad hoc network.In the scheme,divided group based on geographical location into several sub-groups,that reduced communication overhead for limiting message transmission distance within a sub-group.It adopted the combination of key agreement and distribution to generate,distribute and update group key,that made it avoid single point of failure while improving efficiency.Based security of the scheme on solving elliptic curve discrete logarithm problem.Through analysis,the scheme provides higher availability.