Keyboard controlled security apparatus with key designation...

Details Keyboard controlled security apparatus with key designation... Keyboard controlled security apparatus with key designation...

H - Electricity

04

L

340/175, 340/70

H04L 9/00 (2006.01) G07C 9/00 (2006.01) G07F 17/12 (2006.01)

Patent

CA 1158744

ABSTRACT Security apparatus comprising a keyboard having an array of selectively actuable keys operable to generate an output code according to values designated to the keys. A series of display units display values designated to the keys and there is means operative so as to scramble the key designations randomly so that the key designations are varied between successive operations of the keyboard.

370679

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