Re: [TLS] Last Call: draft-hoffman-tls-additional-random-ext (Additional Random

Marsh Ray <marsh@extendedsubset.com> Mon, 26 April 2010 19:04 UTC

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Date: Mon, 26 Apr 2010 14:04:29 -0500
From: Marsh Ray <marsh@extendedsubset.com>
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To: Dean Anderson <dean@av8.com>
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Cc: Paul Hoffman <paul.hoffman@vpnc.org>, ietf@ietf.org, tls@ietf.org
Subject: Re: [TLS] Last Call: draft-hoffman-tls-additional-random-ext (Additional Random
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On 4/26/2010 1:04 PM, Dean Anderson wrote:
> On Mon, 26 Apr 2010, Marsh Ray wrote:
> 
>> On 4/23/2010 12:12 PM, Nicolas Williams wrote:
>>>
>>> Irrelevant: if the random octets being sent don't add entropy (because
>>> they are sent in cleartext) then this extension is completely orthogonal
>>> to PRNG failures.
>>
>> Even though they are sent in-the-clear, the random data do serve the
>> same useful purpose as the existing [cs]_random data.
> 
> Except they aren't actaully random, they are pseudo-random.

http://tools.ietf.org/html/rfc2246 :
> 7.4.1.2. Client hello
> 
> [...]
>
>    random_bytes
>        28 bytes generated by a secure random number generator.

Not pseudorandom, "generated by a secure random number generator".

- Marsh