The X.509 VID Task Force (X5VTF) is a task force of the ToIP Technology Stack Working Group, which intends to explore how X.509 identifiers can be part of the ToIP verifiable identifier landscape.

For a complete overview of the development process for the ToIP technology stack, see Evolution of the ToIP Stack.


The deliverable of this Task Force is the did:x509 Method Specification that must meet the requirements of a verifiable identifier (VID) as specified in the ToIP Technology Architecture V1.0 Specification and the draft ToIP Trust Spanning Protocol Specification. The requirements in this specification must interoperate with other ToIP component specifications as explained in the Evolution of the ToIP Stack.


Please add your name to this list if you wish to be a lead/co-lead of this task force:

Membership and Joining

Prior to participating in the meetings please ensure that you are a member of the Trust Over IP Foundation. Contributor level membership is available to anyone at no cost. Details can be found at this link.

To join this TF, add your name to this list:

Meeting Schedule and Notes

The proposed meeting schedule is every other week on Thursdays, starting 14 December 2023:

  • NA/EU: 08:30-09:30 PT / 16:30-17:30 UTC
  • APAC: 18:00-19:00 PT / 02:00-03:00 UTC (On Wednesdays and jointly with TSPTF)

Please check the ToIP Calendar for current times and Zoom links for these meetings.

Meeting Notes, including Zoom recordings, are kept for every meeting — see the X5VTF Meeting Pages for an index.

Meetings agendas are also announced on the ToIP Slack channel #tswg-x509-vid-tf. Please join us there.


To be discussed in opening meeting.

Intellectual Property Rights (Copyright, Patent, Source Code)

As a Task Force (TF) of the Technology Stack WG (TSWG), the X5VTF inherits the IPR terms from the TSWG JDF Charter.

Mailing List and Communications

This task force uses the following for communications

  • Mailing List: This TF is not using a separate mailing list but sending all emails to the full Technology Stack WG mailing list.
  • Github: Use the Discussions tab: 
  • Slack: The ToIP Slack channel is #tswg-x509-vid-tf