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This Work Group operates under the Kantara IPR Policy - Option Patent & Copyright: Reciprocal Royalty Free with Opt-Out to Reasonable And Non discriminatory (RAND) (HTML version).

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UMA terminology: just like OAuth

We've updated the main UMA architectural diagram, replacing the original UMA-specific terminology with OAuth names. In the process, the diagram also went from being a circle to being a "marvelous spiral". You can find several varieties of the diagram on the Attachments page. Thanks once again to our Graphics Editor, Domenico Catalano, for his excellent work.

The purpose of the UMA Work Group (charter) is to develop specs that let an individual control the authorization of data sharing and service access made between online services on the individual's behalf, and to facilitate interoperable implementations of the specs. Read the spec, join the group, check out the implementations, test your interop, get involved!

Follow us on Twitter – our handle is @UMAWG and we often use the hashtag #UMAWG. (Short link for this page is – spread the word.) Find us on Facebook too.


  • May 30: Eve Maler, Maciej Machulak, and Thomas Hardjono have been re-elected to the chair, vice-chair, and spec editor leadership team positions, respectively, for the next year. Thanks to the WG for its ongoing support!
  • May 10: New UMA 101 slides, prepared for IIW 16 this week. Check 'em out!
  • May 4: New case study: Access Management 2.0 for the Enterprise. UMA's not just for human beings! It can help organizations do API-friendly, developer-friendly, mobile-friendly access management too.
  • February 18: Eve's presentation to the MIT Legal Hackathon is now available. Subject: The Three S's of Distributed Authorization: Safe, Simple, Scalable.
  • January 25: We've submitted a new Internet-Draft to IETF for consideration: Binding Obligations on User-Managed Access (UMA) Participants (nicer HTML)!
  • Chair: Eve Maler
  • Vice-Chair: Maciej Machulak
  • Full leadership team list
  • Read about Kantara leadership roles
Teleconference Info



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