Keylogging (Keystroke logging): A keylogger is added to the users computer and it records every
keystroke the user enters. Software, a program installed on the computer. The computer is often
compromised by a trojan, where the payload is the keylogger or a backdoor. The keylogger calls home
or uploads the keystrokes to a server at regular intervals. Hardware, attached to the USB port where
the keyboard is plugged in. Can either call home or needs to be removed to retrieve the information.