I thought of an application I don't think the PRF extension covers: multi-party encryption (which seems pretty obvious in hindsight...). If the sender and recipient are the same, then a PRF can be used well enough to derive a symmetric key. But not so if the sender and recipient are not the same (and their PRFs are therefore different). For that I believe you would need direct access to some kind of Diffie-Hellman construct. -- GitHub Notification of comment by emlun Please view or discuss this issue at https://github.com/w3c/webauthn/issues/1595#issuecomment-832152932 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-configReceived on Tuesday, 4 May 2021 18:29:28 UTC
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