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.