Viruses, Worms, and Trojan Horses are all malicious computer programs that threat your data security and integrity.
What are they and what are the differences between Viruses, Worms, and Trojan Horses?
- Viruses -- A computer virus is a small program written to alter the way a computer operates, without the permission or knowledge of the user. It have to execute itself and replicate itself.A virus's duplicate requires the spreading of an infected host file.
- Worm -- Worms are programs that replicate themselves from system to system without the use of a host file. First it takes control of features on the computer that can transport files or information. Once a worm is in your system, it can travel alone automatically.
- Trojan horse -- Trojan horses are files that claim to be something desirable but, in fact, are malicious. A very important distinction between Trojan horse programs and true viruses is that they do not replicate themselves. For a Trojan horse to spread, you must invite these programs onto your computers; for example, by opening an email attachment or downloading and running a file from the internet.