> Can't the requester sign the <ArtifactResolve> message? Am I
> missing something?
This is somewhat off-topic, but apropos for the question...I continue to
wonder how one can be confident in the sender of a message based on a
signature. That authenticates the message, but not the sender, and it seems
like in this case moreso than many others in SAML, you *really* care about
the sender quite a lot.
You could "trust" that the client is doing TLS server-auth to prevent a
MitM, but that seems like a strange thing to do from the server end to
protect the dereferencing of the artifact.
Maybe I'm just being picky, but it's always bugged me.
-- Scott