Trojan horse
Named after the Trojan horse, which delivered soldiers into the city of Troy, Trojan horse or Trojans are malicious computer programs that pretend to perform a desirable function but in fact perform some other malicious functions. A Trojan horse program is largely a delivery vehicle designed to infect your machine.
A Trojan horse therefore
• Appears to be a useful program to entice you
• Does not have the ability to reproduce itself as in case of computer viruses or worms
What Trojans can do?
Trojans can simply annoy you by changing your desktop or adding silly icons or they can wreak havoc by deleting files and destroying information on your machine.
They can also create a backdoor on your computer for malicious users, enabling them to access your system thereby compromising on your confidential as well as personal information.
Trojans can also perform other malicious functions they are designed to perform.
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