Time stamp protocol

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The Time-Stamp Protocol, or TSP is a cryptographic protocol for certifying timestamps using X.509 certificates and public key infrastructure. The timestamp is the signer's assertion that a piece of electronic data existed at or before a particular time.

See also[edit]

Trusted timestamping

External links[edit]

  • IETF RFC 3161, official specification
  • IETF RFC 5816, ESSCertIDv2 Update for RFC 3161
  • [1] Documentation for the OpenSSL ts(1) command.
  • OpenTSA was an open-source project to add time stamping functionalities to OpenSSL. (Archived July 12, 2012, at the Wayback Machine)