From: "Richard Martin" <rmartin@aw.sgi.com>
Date: Thu, 22 Feb 1996 20:03:14 +0800
To: IPG Sales <ipgsales@cyberstation.net>
Subject: Re: Internet Privacy Guaranteed ad (POTP Jr.)
In-Reply-To: <Pine.BSD/.3.91.960221151319.3814I-100000@citrine.cyberstation.net>
Message-ID: <9602211759.ZM15248@glacius.alias.com>
MIME-Version: 1.0
Content-Type: text/plain



-----BEGIN PGP SIGNED MESSAGE-----

On Feb 21,  3:16pm, IPG Sales wrote:
> Subject: Re: Internet Privacy Guaranteed ad (POTP Jr.)
> Mike, the keys are encrypted with an OTP that only the intended recipient
> can open - a special, subsystem used for that purpose only - employing
> the same techniquers, but entirely separate and apart from the primary
> user system -  any inteceptor would have to break trhe system, which we
> claim is impossible.

see
http://www.marcus.rts.com.au/faq/one-time.html for a really brief summary
of the assumptions I'm about to use.

a) if I use a chunk of data A to encrypt another chunk of data B, then
   my method of encryption is *not* a one-time pad if size(A) < size(B)

b) the security of a one-time-pad O is only as good as any encryption used
   to exchange O between two parties, which leads to...

c) if C. lu`Lez, an Idiotic Pseudo-security Generator, wishes to transmit
   a chunk of data A to L. User, then for A (if A is truly random to begin
   with) to have the security of a one-time pad, A must be exchanged using
   a one-time pad B where size(B) > size(A)

d) CONTRADICTION: If C and L already share B, which is greater in size
   than A, *why is C sending more keys*?

Of course, it all works out if you stop expecting A to be a one-time pad when
it gets to L.

richard

-----BEGIN PGP SIGNATURE-----
Version: 2.6.2

iQCVAwUBMSuj3h1gtCYLvIJ1AQF1hwP/a7RabRjyXfLSa1IbpdJjP91Su/Rskwjh
8k9GiihQsiQ/nyWkqp8wbNehjNj/n8smz0q+3wQUu5tSotWtv6ws8qJA4ntQhMGi
MePVQBX/1XMg2pMOr7VUca0cys/GXxXyJAOgzU/muSLxUkLtlGxwLV06yc5npuo0
j+y4M6igowI=
=TVkd
-----END PGP SIGNATURE-----

-- 
Richard Martin
Alias|Wavefront - Toronto Office [Co-op Software Developer, Games Team]
rmartin@aw.sgi.com/g4frodo@cdf.toronto.edu      http://www.io.org/~samwise
Trinity College UofT ChemPhysCompSci 9T7+PEY=9T8 Shad Valley Waterloo 1992