Providing Interoperable Time Stamping Services
نویسندگان
چکیده
This paper presents a web-based architecture for providing digital time stamping services. Time stamping services are typically divided into schemes which rely on unconditionally trusted Time Stamping Authorities (TSAs) and schemes which do not, namely the so called linking schemes. The proposed architecture relies on a multi-tier structure. The middle-tier exposes digital time stamping functions behind a unified interface. The specific scheme implemented in the back-end (i.e. trusted TSA or linking scheme) is hidden to the clients. Services are made available via Web services technology. We discuss the main issues we had to address, and motivate our implementation choices. A prototype of the proposed architecture has been developed and used for conducting interoperability tests.
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