High Quality Content by WIKIPEDIA articles! Hardware keyloggers are used for keystroke logging, a method of capturing and recording computer users' keystrokes, including sensitive passwords. They can be implemented via BIOS-level firmware, or alternatively, via a device plugged inline between a computer keyboard and a computer. They log all keyboard activity to their internal memory. Hardware keyloggers have an advantage over software keyloggers as they can begin logging from the moment a computer is turned on (and are therefore able to intercept passwords for the BIOS or disk encryption software). All hardware keylogger devices have to have the following A microcontroller - this interprets the datastream between the keyboard and computer, processes it, and passes it to the non-volatile memory A non-volatile memory device, such as flash memory - this stores the recorded data, retaining it even when power is lost. Generally, recorded data is retrieved by typing a special password into a computer text editor. The hardware keylogger plugged in between the keyboard and computer detects that the password has been typed and then presents the computer with "typed" data to produce a menu.

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