Re: [TLS] draft-ietf-tls-curve25519-01: Is public key validation necessary or helpful?

Ilari Liusvaara <ilariliusvaara@welho.com> Thu, 31 December 2015 20:50 UTC

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Date: Thu, 31 Dec 2015 22:49:58 +0200
From: Ilari Liusvaara <ilariliusvaara@welho.com>
To: Eric Rescorla <ekr@rtfm.com>
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Subject: Re: [TLS] draft-ietf-tls-curve25519-01: Is public key validation necessary or helpful?
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On Thu, Dec 31, 2015 at 12:23:50PM -0800, Eric Rescorla wrote:
> On Thu, Dec 31, 2015 at 12:20 PM, Ilari Liusvaara <ilariliusvaara@welho.com>
> wrote:
> 
> 2. Implementations which only do new algorithms can mandate EMS and not
> implement old derivation at all, provided we make that a rule here.

Well, the EMS spec already says that endpoints SHOULD abort if
extension is not present if they don't want to interop with
legacy implementations.


-Ilari