Tecxoft TSA(Timestamp Authority) service has compliance with IETF RFC 3161. It can work as internal service with Tecxoft signer server, as well as with other third-party applications requesting timestamps. Support major hash algorithms, including SHA1, SHA256 and SHA512. TSA response is digitally signed with a X509 certificate, with applying all PKI rules. Presence of a timestamp in the signature generated by a trusted TSA ensures that the time, signature was created is correct.

A trusted digital timestamp gives a strong evidence that the document existed at a particular time. Definition of digital timestamps given by Wikipedia can be found at this link.

In this process, client software sends the fingerprint of the data (file) to our TSA. The TSA puts the fingerprint and current time in an envelop and put its digital signatures. Result is a timestamp token that is returned to the client, this token also include certificate of the TSA.

TSA Test: Test service requires HTTP authentication, please signup. Any tool supporting RFC3161 can use the service.

Please find more details about TSA in this link https://tsa.tecxoft.com.