A keylogger is a computer program that records the keys that the user strikes on his computer keyboard, making it possible for an attacker to collect his login credentials—everything a cybercriminal needs to steal his identity or money.
A keylogger can end up on your computer when you download an infected file or email attachment. It can also land on your device with a simple visit to a site designed to drop it.
A keylogger can be the computing equivalent of a video camera or an audio recorder.
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