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Subject: RE: [saml-dev] FW: Help with what standards support these WebServices calls?

Well, thanks Hal and Scott for these comments and the others preceding them.
Let us go away and mull over your responses and come back once we have cleared up our own 'fud'.

-----Original Message-----
From: Cantor, Scott E. [mailto:cantor.2@osu.edu] 
Sent: Wednesday, 23 February 2011 12:13 p.m.
To: Hal Lockhart; Colin Wallis; saml-dev@lists.oasis-open.org; colin_wallis@hotmail.com
Subject: RE: [saml-dev] FW: Help with what standards support these Web Services calls?

> As someone else noted, WS-Trust could also be used for steps 1 & 2. The
> main advantage in using WS-Trust vs.. SAML Authn Req is that WS-Trust has a
> mechanism for conveying a key back to the requestor (corresponding to the
> key in the Token) which can then be used for message protection and to bind
> the SAML Assertion to the message contents, assuming Agency 1 & Agency 2
> have the necessary cryptographic capabilities. With SAML Authn Req, Holder
> of Key Subject confirmation cannot be used unless some other means of key
> distribution is provided.

Anything you can do with WS-Trust, you can do with SAML. I'd go so far as to say the interoperability is about as likely too (if not higher).

In this specific case, using an attribute is a trivial way to communicate a key back.

-- Scott

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