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What is Trojan?

Posted by Jackie R. on December 7, 2006

The primary difference between virus and trojan is that trojans don’t spread on their own. Trojan is a malicious program that is disguised as legitimate software. The term is derived from the Greek classical myth of the siege of Troy. Trojan horse programs work in a similar way: they may look useful or interesting (or at the very least harmless) to an unsuspecting user, but are actually harmful when executed. A Trojan horse can be deliberately attached to otherwise useful software or it can be spread by tricking users into believing that it is a useful program.


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