Re: [webauthn] Clarify the need for truly randomly generated challenges (#1856)

@dolda2000 When you say "very long-lived", what do you mean in concrete terms? Minutes, hours, days, months?

I'm guessing that when most of those resources say "long timeout" they mean something like 15 minutes at most - as opposed to the maybe 1 or 2 minutes one might have in second factor authentication flows. While ~15 minutes is long enough that memory exhaustion attacks could be an issue, it's short enough to prevent most "pre-play" attacks.

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Received on Tuesday, 21 February 2023 09:22:37 UTC