Understanding Keyloggers and other Spyware Technologies



If all other attempts to gather passwords fail, then a keystroke logger is the tool of choice for hackers. Keystroke loggers (keyloggers) can be implemented either using hardware or software. Hardware keyloggers are small hardware devices that connect the keyboard to the PC and save every keystroke into a file or in the memory of the hardware device. In order to install a hardware keylogger, a hacker must have physical access to the system.
Software keyloggers are pieces of stealth software that sit between the keyboard hardware and the operating system so that they can record every keystroke. Software keyloggers can be deployed on a system by Trojans or viruses.

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