RFC3161 compliant Time Stamp Authority (TSA) server

Description

Note: On September 3, 2026, DigiCert replaced three timestamping certificates. See The chain can be downloaded as follows below.

An RFC3161 timestamp server provides an essential function in protecting data records for the long-term. It provides proof that the data existed at a particular moment in time and that it has not changed, even by a single binary bit, since it was notarized and time stamped.

Important: TSA certificates are updated at least every 15 months, per industry requirements

DigiCert offers an RFC 3161 timestamp server; therefore, it is now possible to sign files with Microsoft Authenticode RFC3161 compliant timestamping server. See RFC 3161 Internet X.509 Public Key Infrastructure Time-Stamp Protocol (TSP).