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Article #2642

Hey, look, I didn't invent this stuff!

#2642
From: Christopher_C_Lapp
Date: Sat, 02 Jan 1993 17:28
21 lines
1492 bytes
Plaintext encryption can be used to militarily disarm an 
enemy.  Suppose all traffic of an organization was first 
encrypted in meaningful plaintext that was at least 
partially empricially verifiable.  Then >this< plaintext 
was encrypted with a compromisable standard-issue 
encrpytion scheme, and an adversary was given the 
means to decrypt this  cover-decrypt,  and read the 
plaintext.  Now give the adversary a  Coventry-type 
situation.  Your true message may be:  We need a sack 
of potatoes for the officers s dining room at base such 
and such.   But the encrypted message (plaintext) reads : 
 We have decided to bomb location [The  Coventry ], 
and destroy adversary x s radar equipment.   This 
plaintext message is then encrypted, in say, DES, and 
transmitted through the usual channels.  Some latter-day 
Churchill on the adversary s side may decide to let the 
radar facility be bombed, to preserve his ability to 
monitory DES-level communicaitons.  The originator of 
the message may >have< to bomb the radar facility, to 
maintain the illusion that the plaintext encrypt is actually 
a plaintext decrypt.  Isn t the spy business fun?
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Message-ID: <72785@cup.portal.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!portal!cup.portal.com!Christopher_C_Lapp

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Path: arc1-ca.pugleaf.net!sparky!uunet!portal!cup.portal.com!Christopher_C_Lapp
From: Christopher_C_Lapp@cup.portal.com
Newsgroups: sci.crypt
Subject: Hey, look, I didn't invent this stuff!
Message-ID: <72785@cup.portal.com>
Date: Sat,  2 Jan 93 09:28:45 PST
Organization: The Portal System (TM)
Distribution: usa
Lines: 21