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The behavioral biometric of keystroke dynamics uses the manner and rhythm in which an individual types characters on a keyboard or keypad. [ 13 ] [ 14 ] [ 15 ] The user's keystroke rhythms are measured to develop a unique biometric template of the user's typing pattern for future authentication. [ 7 ]
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.
PRF is a pseudorandom function of two parameters with output length hLen (e.g., a keyed HMAC) Password is the master password from which a derived key is generated; Salt is a sequence of bits, known as a cryptographic salt; c is the number of iterations desired; dkLen is the desired bit-length of the derived key; DK is the generated derived key
Hardware keyloggers are used for keystroke logging, a method of capturing and recording computer users' keystrokes, including sensitive passwords. [1] 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.
INV invoked the "inverse" (whatever that meant) of the following function, and was recorded in a program as a separate keystroke (code 22), while 2nd invoked a completely different function which was written on the keypad faceplate just above the key. For example, pressing 2nd x 2 invoked the sin function, while INV 2nd x 2 (or INV sin) gave ...
A training data set is a data set of examples used during the learning process and is used to fit the parameters (e.g., weights) of, for example, a classifier. [9] [10]For classification tasks, a supervised learning algorithm looks at the training data set to determine, or learn, the optimal combinations of variables that will generate a good predictive model. [11]
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Pinch. A 2+ finger gesture commonly used to zoom out; Zoom. A 2+ finger gesture commonly used to zoom in; Initial Act. The action or actions necessary to prepare the system for use (e.g. unlocking device, tapping an icon, entering a password). Tap. Tapping some area of the screen to effect a change or initiate an action. Swipe.