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 proposed the concept of the repairable property of the key distribution protocol.In this paper, we analyze the key distribution protocol proposed by Hwang and Ku, point out the security problem and whether the protocol has the full repairable property The proposed key distribution protocol based on the repairable feature proposed in this paper solves the security problem of the original protocol and proposes a method of hiding the duplicate event tag and applying it to the repairable key distribution protocol to succeed Solve the original agreement can be completely repairable.