keystroke logging

Keystroke logging is a diagnostic used in software development that captures the user's keystrokes. It can be useful to determine sources of error in computer systems. Such systems are also highly useful for law enforcement and espionage – for instance, providing a means to obtain passwords or encryption keys and thus bypassing other security measures. Keystroke logging can be achieved by both hardware and software means. Commercially available systems include devices which are attached to the keyboard cable (and thus are instantly installable, but visible if the user makes a thorough inspection) and also devices which can be installed in keyboards (and are thus invisible, but require some basic knowledge of soldering to install). Writing software applications for keylogging is trivial, and like any computer program can be distributed as a trojan horse or as part of a virus or worm. The FBI is known to possess a trojan horse-delivered keylogger program known as Magic Lantern. It has used a keystroke logger (perhaps this one) to obtain the PGP pass phrase of a suspect in Philadelphia. He was convicted.

External links

Keycatcher one hardware PS/2 keyboard logger with US and UK sites. BBC article
Keystroke Loggers - Keystroke logging software and hardware devices for all operating systems.
KeyLoggers - Known KeyLoggers definitions and removal information and tools.

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