一种改进的可修复密钥分配协议

An Improved Reparable Key Distribution Protocol

Hwang和Ku提出了密钥分配协议可修复特性的概念 .在本文中针对Hwang和Ku所提出的密钥分配协议进行分析 ,指出该协议存在的安全问题及在该协议是否具有完全可修复特性问题上出现的争论 .本文所提出的基于可修复特性的密钥分配协议解决了原协议所存在的安全问题 ,而且提出了隐藏重复事件标记方法 ,并将其应用于可修复密钥分配协议从而成功解决了原协议的完全可修复性问题 .

Hwang and Ku introduced a concept of reparability feature into key distribution protocol.In this paper,the key distribution protocol,proposed by Hwang and Ku,is analyzed.This paper also presentes security problems in Hwang and Ku′s protocol,and furthermore,the argument on whether the protocol has the perfect reparability feature.So,an improved reparable key distribution protocol is proposed in this paper,which solves these security problems.A method,hiding the duplicated event markers,is also proposed and is applied in the protocol to successfully solve the perfect reparability problem.