Subject: RE: [TLS] draft-chudov-cryptopro-tlsprfneg-00.txt

From: [email-masked]
Date: Mon, 30 May 2005 07:58:45 +0300

Hi,

It does seem that having a way to use some other PRF than the 
standard one would be useful in some (very limited) 
circumstances.

However, I'm not so sure about the usefulness of adding a 
new negotiation mechanism for it. It was proposed earlier 
that we could simply define the PRF (and the hash used when 
calculating Finished messages) to be part of the ciphersuite;
this sounds like a reasonable and simple approach to me. 

(Of course, for those ciphersuites that don't say anything 
about the PRF, it would be the standard TLS-PRF, so there's
no need to have this included in 2246bis.)

Best regards,
Pasi

> -----Original Message-----
> From: Eric Rescorla
> Sent: Thursday, May 26, 2005 5:38 PM
> To: [email-masked]
> Subject: [TLS] draft-chudov-cryptopro-tlsprfneg-00.txt
> 
> 
> WG members: 
> 
> G. Chudov has just posted 
> draft-chudov-cryptopro-tlsprfneg-00.txt, which
> describes a scheme for PRF negotiation for TLS.  The major motivation
> for this is to enable GOST use in TLS, because for regulatory reasons
> GOST cannot be used with non-GOST hash functions. This would 
> be a major 
> technical change to TLS. 
> 
> Is this work that the TLS WG wants to take on? 
> 
> Please submit comments before June 10.
> 
> -Ekr

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