Patent ID: 8847607
Filing Date: 2014-09-30
Classification: G06K,G07F

Abstract:
1. A device for protecting an electronic payment terminal, the device comprising: an electronic printed circuit board having a surface; a casing having an internal surface at a bottom of said casing; at least one capacitive detector positioned in a volume formed by a first ground plane corresponding to a surface resting on the surface of said printed circuit and a second ground plane corresponding to a surface resting on the internal surface at the bottom of said casing, said second ground plane being solid or a conductive paint, and said at least one capacitive detector being configured to deliver a reference capacitance of said volume; a capacitive measurement microprocessor electrically connected to said at least one capacitive detector, said at least one microprocessor being configured to detect a variation of capacitance of said at least one capacitive detector, said variation of capacitance corresponding to a variation of capacitance in said volume due to any insertion of an object, formed by one or more conductive parts, between said capacitive detector and one of the ground planes defining the volume containing the capacitive detector, said insertion modifying magnetic field lines between the first and second ground planes; and a transmitter configured for transmitting a piece of information representing said variation of capacitance when an absolute value of a difference between said measured capacitance and said reference capacitance exceeds a predetermined threshold.