电子文档时间戳的分布式时间链安全协议

Distributed Time-chain Security Protocol Based on E-document Time-stamping Service

时间安全在电子合同中是一个十分重要的问题。时间戳解决两个问题:文档是何时生成的;文档是何时发出的。由信任的第三方(T.T.PTrustThirdParty)来完成工作,他必须连续记录这些时间形成时间链以保证安全。使用并相信惟一的第三方,仍存在安全隐患。介绍了现有的两种协议,提出以多个第三方采用分布式模型形成时间链的协议,提高了时间戳的安全度。

Time security is an important issue in E-contract and the Time-stamping Service(TTS) is the main solution which records the time when the document is produced and the time when the document is sent.The TTS is implemented by the trust third party(T.T.P).But there exists security bottleneck because only one T.T.P is used.This paper presents a distributed time-chain protocol by using more than one T.T.P which improves the security lever and makes no additional burdens for users.