【摘要】 对于大型动态多播组的密钥管理,目前都存在一个共性难题:为了确保组通信安全,组内成员需要共享一个组通信密钥。对于组中频繁的成员变化,需要相应改变组通信密钥,这样的系统开销很庞大。本文提出一种基于椭圆曲线密码体制的大型动态多播组的分层二级密钥管理方案,将原来的组通信密钥改为多层两级密钥,这样大大减小了系统开销,便于管理,并且使用椭圆曲线密码体制加强了通信安全。更多还原

【Abstract】 For the key management of large dynamic multicast groups, there is a common difficulty: In order to insure group communication security, the members of a group are required to share a group communication key. But, when the numbers often change, the key must be often changed too. So the system overhead is very large. In this paper, we present a hierarchical two-level key management for large dynamic multicast groups based on the elliptic curve cryptosystem. The group communication key is substituted by multiplayer and two-level keys. In this scheme, the system overhead is reduced greatly, and the group key management becomes easy. The communication security can be increased by applying the elliptic curve cryptosystem.更多还原