UMA Trust Model
Several documents produced by the UMA Work Group related to trust.
http://docs.kantarainitiative.org/uma/draft-uma-trust.html
Specification documenting the binding obligations on UMA participants. (You can see the old document that used to live on this page by visiting old revisions.)
Slide deck
Slides explaining the current state of the Binding Obligations work.
http://kantarainitiative.org/confluence/display/uma/UMA+Trust+Model+User+guide
Domenico Catalano's latest work on leveraging UMA in an actual deployed ecosystem.
http://kantarainitiative.org/confluence/display/uma/Measuring+elements+of+Trust
Domenico's early study analyzing the UMA trust proposition.
More trust-related documents to come!
NOTE: The short link http://tinyurl.com/umatrust takes you to this page.