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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.
The pause command in DOS requests the user to "Press any key to continue." In computing, "Press any key to continue" (or a similar text) was a historically used prompt to the user when it was necessary to pause processing. The system would resume after the user pressed any keyboard button.
Keyboard overlays - a fake keypad is placed over the real one so that any keys pressed are registered by both the eavesdropping device as well as the legitimate one that the customer is using. [2] Key commands - exist in much legitimate software. These programs require keyloggers to know when you’re using a specific command.
The behavioral biometric of keystroke dynamics uses the manner and rhythm in which an individual types characters on a keyboard or keypad. [4] [5] [6] The user's keystroke rhythms are measured to develop a unique biometric template of the user's typing pattern for future authentication. [7]
The standard encoding of the keyboard that offers the INT 16 h is a US keyboard. To adapt the coding of the INT 16h to another type of keyboard (for example, an international keyboard), the code must analyze the scan-code of the key pressed, and then perform suitable interpreting.
A hardware interrupt generated when a key is pressed or released, see keyboard controller (computing) Topics referred to by the same term This disambiguation page lists articles associated with the title Keyboard interrupt .
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 release. Some additional keys have an E0 (or rarely, E1 or E2) prefix.
The <modifier> is normally omitted if no modifier keys are pressed, but most implementations always emit the <modifier> for F1–F4. (draft section) Xterm has a comprehensive documentation page on the various function-key and mouse input sequence schemes from DEC's VT terminals and various other terminals it emulates. [13]