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Key rollover is the ability of a computer keyboard to correctly handle several simultaneous keystrokes. A keyboard with n-key rollover (NKRO) can correctly detect input from each key on the keyboard at the same time, regardless of how many other keys are also being pressed. Keyboards that lack full rollover will register an incorrect keystroke ...
Keystroke logging, often referred to as keylogging or keyboard capturing, is the action of recording (logging) the keys struck on a keyboard, [1] [2] typically covertly, so that a person using the keyboard is unaware that their actions are being monitored. Data can then be retrieved by the person operating the logging program.
In cases in which the computer case is hidden from view (e.g. at some public access kiosks where the case is in a locked box and only a monitor, keyboard, and mouse are exposed to view) and the user has no possibility to run software checks, a user might thwart a keylogger by typing part of a password, using the mouse to move to a text editor ...
The keyboard controller also handles PS/2 mouse input if a PS/2 mouse port is present. Today the keyboard controller is either a unit inside a Super I/O device or is missing, having its keyboard and mouse functions handled by a USB controller and its role in controlling the A20 line becoming integrated into the chipset's northbridge and then ...
The keyboard sends the key code to the keyboard driver running in the main computer; if the main computer is operating, it commands the light to turn on. All the other indicator lights work in a similar way. The keyboard driver also tracks the shift, alt and control state of the keyboard.
PC keyboards since the PS/2 keyboard support up to three scancode sets. The most commonly encountered are the "XT" ("set 1") scancodes, based on the 83-key keyboard used by the IBM PC XT and earlier. These mostly consist of a single byte; the low 7 bits identify the key, and the most significant bit is clear for a key press or set for a key ...
The on-screen keyboard is the most common type of virtual keyboard. The accuracy of this keyboard depends only on hitting the right key. The main purpose of an on-screen keyboard is to provide an alternative mechanism for disabled users who cannot use a physical keyboard, or to provide text input on devices lacking a physical keyboard, such as ...
A computer keyboard is a built-in or peripheral input device modeled after the typewriter ... Anti-spyware applications are able to detect many keyloggers and cleanse ...