Technical specifications

Time-stamping service is an HTTP service and time stamp requests are submitted as HTTP POST requests.


Address of service
Service certificate SK TIMESTAMPING AUTHORITY 2023
Repository Principles for time-stamping service provider, terms and conditions and general terms of subscriber agreement
Time-stamping service policy OID
Test service address
Supported hash algorithms for time stamp request SHA256, SHA384, SHA512
Time stamp signing key parameter 2048bit RSA
Time stamp signing algorithm SHA512withRSA
Time-stamping service policies supported in the request
Time-stamping service extensions supported in the request Not specified
Responses to correct requests include the following
  • status info – Operation Okay,
  • signing hash algorithm,
  • time stamp policy OID,
  • time-stamping time,
  • time-stamping service certificate (without a full certificate chain),
  • extensions used,
  • nonce value,
  • accuracy (0x01 seconds),
  • tsa (general name of the Time Stamp Authority - subject DN of the signing certificate)
Responses to incorrect time stamp requests include the following
  • status info – Rejected,
  • cause of error
Response, if the service has not granted access to time-stamping service HTTP status code: 403 – Forbidden
Response, if not a time stamp request HTTP status code: 400 – Bad Request