– A software program that appears to be benign but then does
something other than expected.
– The Trojan horse is not itself a virus because it does not replicate
but is often a way for viruses or other malicious code to be
introduced into a computer system.
– The term Trojan horse is based on the huge wooden horse used by
the Greeks to trick the Trojans into opening the gates to their
fortified city during the Trojan War. Once inside the city walls,
Greek soldiers hidden in the horse revealed themselves and
captured the city