Re: [webauthn] Improved version of extension for Transaction Confirmation (#2020)

Maybe one more comment from my side after extensive reading on this subject (apologies, but I am fascinated that a challenge-response protocol does not allow sending the challenge to the authenticator in plain form, or at least augment it with custom data).

From what I understood, one of the reasons why web browser vendors did not implement `txAuthSimple` extension was that they did not want to display data provided by the relying party (web page) in the browser UI. We can live without this - no need to display anything. This is why we added a display to our authenticator. The user can only see the challenge data / associated data in the authenticator - we are OK with this. We just need a way to sneak structured data to the authenticator.

I still think the best way to do this is not to destroy the challenge object by hashing it, but having an extension that works the best effort is enough.

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Received on Monday, 11 March 2024 09:45:35 UTC