摘要
仅仅依靠传统的数字签名技术无法提供数据的存在性证明,进而就无法保证活动的不可抵赖性.为了实现时间值与数据的关联,可以通过时戳权威来完成.它是一个可信的第三方,可以提供时戳来建立数据在某一时间存在的证明.通过对现有时戳协议的分析,参照RFC3161中描述的时戳协议,设计实现了一个TSA系统JITTimeStampV1.0.实际应用表明,该系统具有安全、灵活、稳定、高效等特点.
It is hard to guarantee that the signatory cannot deny his/her operation in the trade through digital signature because it cannot provide a 'proof-of-existence' for the particular datum at an instant in time. In order to associate a datum with a particular point in time, a Time Stamp Authority (TSA) may need to be used. This Trusted Third Party ′s role is to time-stamp a datum to establish evidence indicating that a datum existed before a particular time. This paper realizes a TSA system based on PKI according to the analysis of several time\|stamp protocols and referring to RFC3161.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2003年第z1期16-18,共3页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(60175024)
国家教育部符号计算和知识工程重点实验室基金资助项目.
关键词
时戳
时戳权威
公钥基础设施
存在性证明
time-stamp
time stamp authority
public key infrastructure
proof-of-existence
