Re: [webauthn] Add a way to use webauthn without Javascript (#1255)

>prerendering old dynamic stuff, like challenge for registration forms.

You should never reuse a [`challenge`](https://www.w3.org/TR/2019/WD-webauthn-2-20191126/#dom-publickeycredentialcreationoptions-challenge), it should be uniquely generated for each registration/authentication ceremony. See [ยง13.4.1. Cryptographic Challenges
](https://www.w3.org/TR/2019/WD-webauthn-2-20191126/#sctn-cryptographic-challenges) (and pardon me if I misinterpreted what you meant).

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Received on Monday, 25 May 2020 09:57:33 UTC