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Re: [Cfrg] [TLS] Closing out tls1.3 "Limits on key usage" PRs (#765/#769).

Yoav Nir <ynir.ietf@gmail.com> Fri, 03 March 2017 09:22 UTC

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From: Yoav Nir <ynir.ietf@gmail.com>
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Date: Fri, 03 Mar 2017 11:22:08 +0200
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To: Andrey Jivsov <crypto@brainhub.org>
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Subject: Re: [Cfrg] [TLS] Closing out tls1.3 "Limits on key usage" PRs (#765/#769).
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Hi

As an implementer I have no problem counting records, bytes or blocks (OK, the last you usually don’t count directly but (n+15)/16 is not beyond the capabilities of any implementer)

So IMO whichever gives the tightest bound should be selected, and that means blocks.

Exercising the rekey code is up to developers, not document writers.

Yoav

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