RE: [TLS] TLS WG Chair Comments on draft-ietf-tls-authz-07

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Hannes wrote:
> Melinda wrote:
> >
> > and that there are
> > some non-trivial advantages to carrying authorizations in-band.
> Namely... 

I don't wish to speak for Melinda, but this is a view shared by many
within my own community.

I have a long list of applications, collected from within this
community, with which they would like to use SAML-based authorisation;
and it seems to me that the ability for application protocols to share a
common mechanism for expressing authorisation would mitigate or perhaps
even avoid the need to make application-specific authorisation
extensions.

(The fact that SAML-based Web SSO uses SAML that is bound to the
application-layer is, I believe, only an artifact of a requirement to
avoid modifying contemporary Web browsers and I don't think it is an
approach that would necessarily be desirable for the general case.)

Binding authorisation to TLS, as suggested by this document, is one
approach that would satisfy the 'common mechanism' requirement indicated
previously.

josh.

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