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本文从不可否认的安全需求入手,通过分析数字签名和数字时间戳关系,数字时间戳必要性的几个原因,提出了数字时间戳的几种实现方式(本地数字时间戳、联署数字签名和附加数字时间戳)及使用数字时间戳需要注意的安全问题。
Starting from undeniable security requirements, this paper presents several ways to implement digital timestamps by analyzing the relationship between digital signatures and digital timestamps and the necessity of digital timestamps (local digital timestamps, syndication digital signatures and Additional digital timestamps) and security issues that require digital timestamping.