Thomas Wisniewski wrote on 10/26/2004, 2:05 PM:
> Scott, no, just HTTP Redirect.
>
> Using HTTP Post is not best alternative, as the IDP site is typically a
> "protected" site that may require the user to provide their
> credentials. If
> HTTP Post is used, the caching of the <AuthnRequest> at the IDP site
> (while
> the user authenticates) adds additional work/overhead. Versus using HTTP
> Artifact.
You always have to cache the AuthnRequest at the IdP site if/when the
use authenticates. The IdP can't determine if they need to authenticate
the user until the see the authnrequest (whether it comes in through
redirect, post, or artifact).
I would expect that most IdPs would *not* put their AuthnRequest
delivery location within the protected area of the site because
there are options on the AuthnRequest that prohibit the IdP from
interacting with the user.
Conor
