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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.


  • Learn about UMA at IIW 16! Several UMAnitarians will attend IIW on May 7-8 and are planning to convene sessions that highlight UMA-based case studies and demos.
  • 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)!
  • January 6: Dazza Greenwood's presentation on terms of authorization has been uploaded.
  • December 6: The Implementations page has gotten a makeover. Check out the refreshed listing, including a new UMA open-source project at OxAuth. Also see the new case study on subscribing to a friend's personal cloud.
  • October 19: Eve presented on UMA to the XACML TC. Check out the slides.
  • October 19: Check out this YouTube video of our Google Tech Talk from Feb 2012, demoing selective Alice-to-Bob sharing through Bob's OpenID Connect claims. Thanks to Maciej Machulak for getting this published!
  • Chair: Eve Maler
  • Vice-Chair: Maciej Machulak
  • Full leadership team list
  • Read about Kantara leadership roles
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