From: blaster@rd.relcom.msk.su (Victor A. Borisov)
Date: Mon, 18 Oct 93 04:02:13 PDT
To: cypherpunks@toad.com
Subject: Re: Monitor radiation overlooking.
In-Reply-To: <4gjf9GqSMUgEIMznwj@transarc.com>
Message-ID: <ABWKdmi8X0@rd.relcom.msk.su>
MIME-Version: 1.0
Content-Type: text/plain


>   I had a little trouble with the English, but I think I followed the
>   math.  I believe Victor's KGB friend is claiming that DES is a group.
>   Victor, does the following text contradict your claim?
Sorry for my poor English. I want to saw, that DES is`t group. We can`t say,
that:
A k1, k2: E k0, that des(k2, des(k1, text))=des(k0, text)
        (A mean "for all", E mean "exist");

or: E k1, k2: A k0, that des(k2, des(k1, text))!=des(k0, text)

I saw, that:
E f(k, text): A k1, k2: E k0, len(k0)=len(k1)=len(k2), that
des(k2, des(k1, test))=f(k0, text)

f() like des(), but f() is not des()!!!
My friend saw, that introder must try only 2^56 keys for des(des()).
Once more, sorry for my poor English.

PS I am sorry for my stupid letter about PGP randomizer.
--- 
Victor A. Borisov aka blaster;	Relcom R&D;
Email: blaster@rd.relcom.msk.su;
Phone: +7(095)-943-4735; +7(095)-198-9510;
	=== Don`t panic! ===