Re: [webauthn] Adds timeSinceUv extension (#2052)

> > rather than the RP rejecting an assertion because all it could do was find out the time since last UV and then deciding it wasn't recent enough
> 
> @sbweeden By requesting UV=preferred, you are stating that you will accept an assertion without user verification.
> 
> If you will fail the login ceremony completely without UV, you should use UV=required.
> 
> If you are OK with no UV, but need additional context for a risk engine (which may or may not ask for additional information), then you can use UV=preferred with this extension.

This extension does not afford the opportunity for the client+authenticator to prompt for UV, as part of the ceremony, *only if* the time since last UV doesn't satisfy the RPs policy. That's the use case that #2021 covers, that this extension does not.

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Received on Wednesday, 27 March 2024 19:29:25 UTC