Patent ID: 8427422

Claim:
An input device for protecting input information from exposure, the device comprising: a user-input module operable to receive keystroke inputs from a user; a tactile-output-generation module operable to provide a tactile signal to the user-input module; a processor operable to control the tactile-output-generation module to provide the tactile signal to the user through the user-input module only when a predetermined first number of keystroke inputs are determined to have been received from the user through the user-input module by counting the keystrokes, wherein the tactile signal is regarding an instruction to the user indicating when the user should input at least one predetermined input; and a control module operable to accept a next immediate input entered by the user as user input information when the processor generates the tactile signal, wherein the control module does not accept the next immediate input entered by the user as user input information when the processor does not generate the tactile signal, and wherein the control module is operable to check whether the user input information is equal to predetermined input information.