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Re: [Cfrg] draft-irtf-cfrg-eddsa -- one final proposal for domain separation (context labels) for ed25519

"Salz, Rich" <rsalz@akamai.com> Wed, 20 April 2016 11:27 UTC

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From: "Salz, Rich" <rsalz@akamai.com>
To: "Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk>, Daniel Kahn Gillmor <dkg@fifthhorseman.net>, "cfrg@ietf.org" <cfrg@ietf.org>, "draft-irtf-cfrg-eddsa.all@ietf.org" <draft-irtf-cfrg-eddsa.all@ietf.org>
Thread-Topic: draft-irtf-cfrg-eddsa -- one final proposal for domain separation (context labels) for ed25519
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Date: Wed, 20 Apr 2016 11:27:00 +0000
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Cc: Ondřej Surý <ondrej@sury.org>, Robert Edmonds <edmonds@debian.org>, "Kaduk, Ben" <bkaduk@akamai.com>, Martin Thomson <martin.thomson@gmail.com>
Subject: Re: [Cfrg] draft-irtf-cfrg-eddsa -- one final proposal for domain separation (context labels) for ed25519
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This is okay with me, except for one pedantic clarification.  "Empty string" has a specific meaning in C, it's a single NUL byte.  Since our other uses of context including the NUL terminator, to avoid prefix attacks, then I think the wording needs some editing.

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