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Re: [quicwg/base-drafts] Why does stateless reset have to be checked after MAC failure (#2152)

Kazuho Oku <notifications@github.com> Tue, 27 August 2019 17:29 UTC

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From: Kazuho Oku <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Why does stateless reset have to be checked after MAC failure (#2152)
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OK for comparing each reset token, I think using PRP can be considered as a way of implementing constant-time comparison.

Then, the discussion would be if we should state something like: "lookup of stateless reset tokens MUST NOT leak timing information. Such lookup table can for example be implemented by using PRP(stateless_reset_token) instead of the stateless reset token itself, for lookup and comparing the values."



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