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Trojan horse
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Trojan horse /n./ [coined by MIT-hacker-turned-NSA-spook Dan
Edwards] A malicious, security-breaking program that is disguised
as something benign, such as a directory lister, archiver, game, or
(in one notorious 1990 case on the Mac) a program to find and
destroy viruses! See back door, virus, worm,
phage, mockingbird.
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