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Article #2642Hey, look, I didn't invent this stuff!
From: Christopher_C_Lapp
Date: Sat, 02 Jan 1993 17:28
Date: Sat, 02 Jan 1993 17:28
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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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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