Re: bitwise exclusive-or

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Article #3377

#3377

From: stuart
Date: Mon, 26 Jan 1987 23:27

19 lines
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In article <434@ethz.UUCP>, wyle@ethz.UUCP (Mitchell Wyle) writes:

> Random bits, generated from a radioactive source and calibrated counter
> are collected, and distributed by courier to remote sites.

> Messages are encoded via bit-wise exclusive-or, and transmitted via
> non-secure telecommunications.  The destinations use the courier-provided 

This is an example of the "one time pad", the only unbreakable system.
The only points of attack are the random source and the couriers.

random source	- develop a unified field theory allowing you to reconstruct
		the output of the radioactive source after stealing the
		sample temporarily for analysis.

couriers	- offer them moolah, threaten with death, etc.  (much
		cheaper than the above.
-- 
Stuart D. Gathman	<..!seismo!dgis!bms-at!stuart>

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Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!rutgers!seismo!vrdxhq!bms-at!stuart

References: <434@ethz.UUCP>

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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!rutgers!seismo!vrdxhq!bms-at!stuart
From: stuart@bms-at.UUCP
Newsgroups: sci.crypt
Subject: Re: bitwise exclusive-or
Message-ID: <352@bms-at.UUCP>
Date: Mon, 26-Jan-87 18:27:00 EST
Article-I.D.: bms-at.352
Posted: Mon Jan 26 18:27:00 1987
Date-Received: Sun, 1-Feb-87 16:19:02 EST
References: <434@ethz.UUCP>
Organization: Business Management Systems, Inc., Fairfax, VA
Lines: 19
Keywords: xor
Summary: The only "unbreakable" cipher

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