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A Trojan horse is a seemingly benign program that when activated, causes harm to a computer system.
A Trojan horse is also known as a Trojan virus or Trojan.
The Trojan horse is named for ancient Greece’s apparent gift of peace to the Trojans, when a giant wooden horse was secretly filled with Greek warriors. After the Trojans allowed the horse to enter their great city, the Greek warriors emerged from the horse gained control of the city of Troy.
The following are types of trojan horses: