可任意设置托管代理数量及权重的密钥托管方案

A key escrow scheme for escrow agency of arbitrary number and privilege

基于E lGamal体制设计了一种可任意设置托管代理数量及权重的密钥托管方案,该方案既考虑到部分托管代理数目的灵活性,又考虑到托管方的权重问题,可以有效地防止阈下信道攻击和部分托管代理的主动破坏,同时解决了"一次监听,永久监听"问题。

A key escrow scheme was proposesed, which can set the number of escrow agents and the respective importance of escrow agents arbitrarily, based on ElGamal cryptosystem. The scheme considers not only the number of partial escrow agents flexibly, but also the respective importance of escrow agents. Subliminal channel attack and partial escrow agents attack was prevented, and the problem of ＂once monitor, monitor forever＂ was solued.