Re: [TLS] Industry Concerns about TLS 1.3

Eric Rescorla <ekr@rtfm.com> Fri, 23 September 2016 04:33 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Thu, 22 Sep 2016 21:32:22 -0700
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To: Geoffrey Keating <geoffk@geoffk.org>
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Cc: "tls@ietf.org" <tls@ietf.org>, Ryan Carboni <ryacko@gmail.com>
Subject: Re: [TLS] Industry Concerns about TLS 1.3
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On Thu, Sep 22, 2016 at 8:53 PM, Geoffrey Keating <geoffk@geoffk.org>; wrote:

> Ryan Carboni <ryacko@gmail.com>; writes:
>
> > in the internet of things, DH is actually
> > less secure than normal public key exchange. Servers are more likely to
> > have entropy than embedded devices.
>
> I think that's backwards; in a 'normal' public key exchange, it is the
> client that generates the secret key, the server contributes no
> randomness.
>

Nit: no private randomness. It provides freshness in the form of
ServerRandom and in
TLS that's specified as random.

-Ekr


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