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Subject: R: Token correlation (Nate's summary)

Here is my consideration to one of the observations raised during the call, I think done by Thomas: "it isn't correct to link two SAMLs, because in that way you link the SAML also to the context, the SAML should be valid independently from the context in which it is used".

SAML-Y is valid independently from the context, the <token-correlation> condition doesn't specify  SAML-X, it doesn't specify that SAML-X has to be linked to SAML-Y, it specifies an ID, it specifies that it can be linked to every SAML that have the same ID in the <subject> element.

SAML-Y is valid also if it is linked to SAML-Z, also to SAML-W, the constraint is that

SAML-Y can be used many times with different SAML-K, until it expires.


-----Messaggio originale-----
Da: Thomas Hardjono [mailto:hardjono@MIT.EDU]
Inviato: marted́ 13 luglio 2010 19.35
Cc: Rossini Federico; ndk@internet2.edu; Thomas Hardjono
Oggetto: Token correlation (Nate's summary)


Thank you for presenting your work today to the SSTC.  We would like to hear regular updates about it.

Here is Nate's summary in today's SSTC call:

- The Token Correlation proposal makes sense.
- Use the Condition element.  There are at least 2 choices
  for linking assertion SAML-X with SAML-Y:
  (a) Put a pointer (to SAML-X) inside SAML-Y, or
  (b) Put the entire SAML-X assertion inside SAML-Y.
- Better (preferred) if both SAML-X and SAML-Y assertions
  are valid when they reach the Service provider.

Nate, did I miss anything?



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