无条件安全的会议密钥分配

Unconditionally secure conference key distribution

讨论了无条件安全会议密钥分配问题.针对会议组成员之间的完善保密通信需要大量共享的一次性密钥问题,以双方的无条件安全密钥协商协议为基础,构造了无条件安全的会议密钥分配协议.这里构造的生成树使得会议密钥分配系统能最大程度地并行运行,且对动态变化的会议成员是有效的.

We focus on unconditionally secure conference key distribution. Many onetime keys shared by users are needed for perfect secure communication. Our approach is to use a twoparty key agreement system as an underlying cryptographic primitive and extend it to a conference system which is as secure as the twopart system. With the spanning tree in this paper, the conference key distribution system can be executed in parallel to the largest extent and it is efficient for dynmaic changing group.