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From: kadie@uiucdcsb.cs.uiuc.edu
Newsgroups: sci.crypt
Subject: One time pads and spy devices
Message-ID: <161200004@uiucdcsb>
Date: 13 Feb 88 03:03:00 GMT
Lines: 21
Nf-ID: #N:uiucdcsb:161200004:000:701
Nf-From: uiucdcsb.cs.uiuc.edu!kadie    Feb 12 21:03:00 1988


Could a one time pad be used to make a spy tape recorder or camera?

It would work like this. At the spy's home base two identical
(digital?) tapes are make containing random noise. Then the spy goes
into the field with one tape recording things
by XORing information onto the tape.

If he is every stopped the tape looks completely random so no one
can prove that he was spying or tell what he recorded. 

If the mission is successful he sends the tape back to 
base where they decode it with the other tape.


Carl Kadie
Inductive Learning Group
University of Illinois at Urbana-Champaign
UUCP: {ihnp4,pur-ee,convex}!uiucdcs!kadie
CSNET: kadie@UIUC.CSNET
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