[WG-OTTO] OTTO WG 2/10/15 Draft Minutes

Mike Schwartz mike at gluu.org
Fri Feb 12 16:22:33 CST 2016


Minutes are here:
   
https://github.com/KantaraInitiative/wg-otto/blob/master/minutes/035-otto_minutes-2-10-2016.md

And below for your convenience:

OTTO WG Minutes 2/10/16
STATUS: Draft

## Voting Members Attending:
  - Mike Schwartz
  - Judith Bush
  - Keith Hazelton
  - Rainer Hörbe
  - Yuriy Zabrovarnyy

## Discussion of Draft Initial Design

Janusz created two diagrams and posted a
[message](http://kantarainitiative.org/pipermail/wg-otto/2016-February/000191.html) 
raising some
questions about the issues that are raised by interfederation trust:
[diagram1]
(https://raw.githubusercontent.com/KantaraInitiative/wg-otto/master/files/janusz_intefederation-diagram-question1.png_

[diagram2]
(https://raw.githubusercontent.com/KantaraInitiative/wg-otto/master/files/janusz_intefederation-diagram-question2.png)

For example, how could software figure out which entities to trust based 
on a complex federation mesh!

While this issue needs more discussion, our effort is to provide the 
tools for federation, not the rules.
Each federation could have its own requirements for membership, and in 
many cases, where agreement exists
about the level of assurance, protection or control of data, it would 
not be complete. Perhaps the OTTO WG
could provide schema to help federation operators express the areas 
where interoperability exists. Or OTTO
could at least a pattern which could be followed to express certain 
business relationships which could be
provide software tools with a path towards automation. We should 
re-raise this issue next week when Janusz is available.

Reviewed the wiki OTTO Design: 
[http://www.gluu.co/otto-proposal](http://www.gluu.co/otto-proposal)

Discussion continued on REST endpoints to enable entities to join a 
federation. YuriyZ explained that the path
he envisioned was that a service (for example an OpenID Connect 
Provider) would register with a federation operator,
and obtain an identifier, by calling POST [/federation_entity]
(https://ox.gluu.org/doku.php?id=otto:proposal#federation_entity) The 
entity would then use this identifier to register
with individual federations, using POST [/federations/<federation_id>]
(https://ox.gluu.org/doku.php?id=otto:proposal#join_federation_post) 
Does this approach make sense? Is the entity
registration just the equivalent of the entity's metadata, and perhaps 
the entity should just host this information
on an endpoint such as 
`https://<entity_hostname>/.well-known/otto-configuration` ?

Mike also raised the issue of whether these endpoint should be 
protected? For example, how would a client
be authorized to unjoin a federation? Rainer suggested that this should 
be accomplished using a blockchain
signature verification mechanism. Mike wondered if this should be 
accomplished by requiring an UMA RPT token.
The conclusion was that perhaps, like SCIM, the security mechanism to 
protect the endpoints should be left
up to the federation operator, so left out of scope of OTTO.

Another possibility is that we could use software statements (or 
something equivalent) to allow an entity
to join a federation.


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