Keyloggers are programs that keep track of every key you type while using your computer. This information is stored on your computer, and can sometimes be transferred to a remote attack with a trojan horse. Keyloggers can help a malicious attacker steal sensitive information such as Social Security numbers, Credit Card numbers, and bank account information.

Trojan Horses are malicious programs that run invisibly on your system. Trojan horses can enable a remote attacker to transfer files to and from your computer, delete your files, and view your sensitive information.

Spyware is a generic term for any program that takes your personal information and sends it out from your computer or stores it on your computer. A malicious attacker could use spyware applications to obtain your private information.

Remote Administration programs are generally used by system administrators to control large groups of computers at once, however remote administration programs can also be used by malicious attackers to take complete control over your computer, just as if they were sitting in front of it.
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