The Technology Stack Working Group (TSWG) specifies requirements, specifications, and test suites for the technical architecture of the ToIP stack. For an overview of the ToIP stack, see the Introduction to ToIP white paper. For an overview of the ToIP stack development process, see the Evolution of the ToIP Stack.


The scope of the Technical Stack Working Group (as defined by our charter revised in September 2023) is to define (directly or by reference) the technical standards, test suites, and interoperability certification standards for the Trust over IP architecture stack as described in the Introduction to ToIP paper and the Design Principles for the ToIP Stack paper.


2023 Co-Chairs:

2023 Vice-Chairs:

Task Forces

Much of the work on deliverables of the TSWG is performed by self-organizing Task Forces (TFs). Following are the current active TFs and their current leads. See their home pages for their meeting schedules.

  1. Trust Registry TF (TRTF) — Darrell O'Donnell Andor Kesselman Antti Kettunen 
  2. Authentic Chained Data Containers (ACDC) TF — Samuel Smith Phil Feairheller Kevin Griffin
  3. Technology Architecture TF (TATF) Wenjing Chu Drummond Reed 
  4. Trust Spanning Protocol TF (TSPTF) — Drummond Reed Wenjing Chu Samuel Smith
  5. AI & Metaverse (AIM) Technology TF (AIMTF) Wenjing Chu 
  6. Credential Exchange Protocols TF — Mathieu Glaude 
  7. DID WebS Method Task ForcePhil FeairhellerLance Byrd
  8. X.509 VID Task ForceEric Scouten 


The TSWG currently holds a plenary meeting once every four weeks on Wednesdays in two time slots (one for North America/Europe and one for Asia Pacific time zones):

  1. NA/EU: 08:00-09:00 PT / 15:00-16:00 UTC 
  2. APAC: 18:00-19:00 PT / 01:00-02:00 UTC

Meetings in 2024 will begin on January 23.

For all authoritative meeting logistics and Zoom links, please see the ToIP Calendar.

See the TSWG Meeting Page for an index of all Meeting Pages with agendas, notes and recordings from all meetings.


The table below lists all TSWG deliverables and the Task Forces working on each. Bold = completed. Non-bold = future. WG members are welcome to follow the links to contribute, either by joining the responsible Task Force (TF) or contributing directly to a deliverable document.

Name of DeliverableDeliverable TypeLink to DeliverableTask ForceDeliverable Status
Principles of SSIRecommendationPDFCompletedToIP Approved Deliverable

Design Principles for the ToIP Stack


ToIP Stack Design Principles TF

ToIP Approved Deliverable
ToIP Technology Architecture SpecificationSpecificationToIP webpage (with links to the GitHub version and PDF)ToIP Technology Architecture TFPublic Review Draft 01
ToIP Trust Spanning Protocol SpecificationSpecificationToIP wiki pageTrust Spanning Protocol TFDraft Deliverable
ToIP Trust Registry Protocol SpecificationSpecificationToIP wiki page (with links to current versions)Trust Registry TFDraft Deliverable
ACDC Specification
(Authentic Chained Data Containers)
SpecificationSee ACDC TF home pageACDC TFDraft Deliverable

KERI Specification
(Key Event Receipt Infrastructure)

SpecificationSee ACDC TF home pageACDC TFDraft Deliverable

CESR Specification
(Composable Event Streaming Representation)

SpecificationSee ACDC TF home pageACDC TFDraft Deliverable
SAID Specification
(Self-Addressing Identifier)
SpecificationSee ACDC TF home pageACDC TFDraft Deliverable

OOBI Specification
(Out-of-Band Introduction)

SpecificationSee ACDC TF home pageACDC TFDraft Deliverable
did:webs DID Method SpecificationSpecificationToIP wiki pagedid:webs TFDraft Deliverable
did:x509 DID Method SpecificationSpecificationToIP wiki pageX.509 VID TFDraft Deliverable

How to join

After you have joined Trust Over IP, you can join this WG by signing up for the Working Group's mailing list. Use this link to sign-up for the TWSG-2 mailing list to signify your acceptance of the WG charter and desire to participate in the TSWG-2. Scroll to the bottom of the page.  Log-in using your username and password or LF ID. Then click on the blue button [+Join This Group]. mailing list at Our mailing list is

Members as well as observers are welcome (with the important caveat below).


For the protection of all Members, participation in working groups, meetings and events is limited to members, including their employees, of the Trust over IP Foundation who have signed the membership documents and thus agreed to the intellectual property rules governing participation. If you or your employer are not a member of ToIP, you may not participate in meetings by verbal contribution or otherwise take any action beyond observing.  To join ToIP and be able to contribute, please fill out the light weight membership application on our website here

Intellectual Property Rights (Copyright, Patent, Source Code)

The WG inherits the IPR terms from the JDF Charter. Until 25 October 2023, these are:

After 25 October 2023, the IPR terms changed to: