An image forming apparatus controls a general-purpose numerical key unit so as to maintain a state in which a NumLock LED is turned on in the case where a connecting cable of the general-purpose numerical key unit including a NumLock key capable of selectively switching, in a case that the general-purpose numerical key unit is connected to an information processing device including a display screen, a condition when the information processing devices processes an inputted key signal, between a first processing condition in which the key signal is processed as information on a numerical value and a second processing condition in which the key signal is processed as information for moving a cursor displayed on the display screen, and the NumLock LED capable of notifying a user of that the first processing condition is set for the information processing device by being turned on is connected to a connecting portion (step S15).

Methods and systems for implementing keyboard linked authentication challenges are described. A visual representation of a first string of characters is provided for display on a client computing device. In response to the providing the visual representation for display, several keystrokes on the client computing device that produces a second string of characters are received. A determination that the second string of characters matches the first string of characters is made. A determination that no unauthorized keystrokes are included in the detected plurality of keystrokes is further made. Access is provided to the client computing device upon determining that the second string of characters matches the first string of characters, and determining that no unauthorized keystrokes are included in the detected plurality of keystrokes.

Methods and systems for implementing keyboard linked authentication challenges are described. A visual representation of a first string of characters is provided for display on a client computing device. In response to the providing the visual representation for display, several keystrokes on the client computing device that produces a second string of characters are received. A determination that the second string of characters matches the first string of characters is made. A determination that no unauthorized keystrokes are included in the detected plurality of keystrokes is further made. Access is provided to the client computing device upon determining that the second string of characters matches the first string of characters, and determining that no unauthorized keystrokes are included in the detected plurality of keystrokes.

A control section allows a screen of a display section to display a plurality of numeric keys, detects a touch gesture on the individual numeric key through a touch panel to allow an input of a numeric number corresponding to the numeric key subjected to the touch gesture, and detects an action on each of hard keys to accept an instruction to perform a function corresponding to the hard key subjected to the action. When a predetermined action is performed on one or more individuals of the hard keys, the control section assigns numeric numbers to the respective hard keys and detects an action on the individual hard key to allow an input of the numeric number corresponding to the hard key subjected to the action.

An image forming apparatus controls a general-purpose numerical key unit so as to maintain a state in which a NumLock LED is turned on in the case where a connecting cable of the general-purpose numerical key unit including a NumLock key capable of selectively switching, in a case that the general-purpose numerical key unit is connected to an information processing device including a display screen, a condition when the information processing devices processes an inputted key signal, between a first processing condition in which the key signal is processed as information on a numerical value and a second processing condition in which the key signal is processed as information for moving a cursor displayed on the display screen, and the NumLock LED capable of notifying a user of that the first processing condition is set for the information processing device by being turned on is connected to a connecting portion.