From: Vipul Ved Prakash <vipul@best.com>
Date: Wed, 15 Oct 1997 07:26:58 +0800
To: stewarts@ix.netcom.com (Bill Stewart)
Subject: Re: GOST
In-Reply-To: <3.0.3.32.19971013233228.006e7940@popd.ix.netcom.com>
Message-ID: <199710150254.CAA00671@fountainhead.net>
MIME-Version: 1.0
Content-Type: text



Bill Stewart wrote:

> S-box structure is one of the critical issues in designing
> Feistel-type networks; if you understand the mathematics
> very very well, you can do it yourself, and if you don't,
> then you don't understand it well enough to be sure
> the S-boxes are secure enough, and thus you shouldn't
> be selling it to customers.

Thanks, I shall look up Feistel-type networks. Nope, I don't 
understand the mathematics very very well, and that's why I 
asked. While I haven't seen the official GOST specs but all 
the reference I could find indicates that GOST specs don't 
discuss the process of generating SBOX permutations and GOST 
sboxes are not mathematically understood. 

Regarding the developer's ethical responsibilities with experimental 
technology I rather have the consumer decide (and of course 
document the limitations).

Thanks, 
Vipul 

-- 
Powell lingered. "How's Earth?" 
It was a conventional enough question and Muller gave the 
conventional answer, "Still spinning."
				      -- "Reason", Asimov. 
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