[Openid-specs-fapi] Issue #343: what is authenticity and integrity of the redirect URI? (openid/fapi)

[Brian Campbell]

New issue 343: what is authenticity and integrity of the redirect URI?
https://bitbucket.org/openid/fapi/issues/343/what-is-authenticity-and-integrity-of-the

Brian Campbell:

Baseline has "shall require the `redirect_uri` parameter in authorization requests and evaluate only this parameter to ensure authenticity and integrity of the redirect URI"

What does "evaluate only this parameter to ensure authenticity and integrity" mean? I don't know and don't know how I'd do it. I'm guessing this text is somehow related to wanting to allow non-static redirect URIs to be sent in authenticated PAR. But I can't tell what it actually means or how one would conform to this \(other than requiring the redirect\_uri parameter\).