were sometimes less aggressive in blocking it, though this varies based on current threat definitions. Privacy & Legal Risks:

At its core, a keylogger (keystroke logger) is a hardware device or a software program that records the real-time activity of a keyboard. When a user types a password, an email, or a credit card number, the keylogger captures the keystrokes and saves them to a hidden log file.

Designed to be completely hidden from the user being monitored. Keyboard & Screen Capture: