Grg Banking Equipment Co., Ltd.

Zhulong Lin

Jing He

Ying Han

Junkun Zhang

Disclosed is an anti-spying encrypted keyboard, particularly an anti-spying encrypted keyboard having an anti-spying detection protective system in multiple aspects. The anti-spying encrypted keyboard comprises a key panel and a main control board. The main control board includes a control circuit with self-destruct function. The control circuit is fixedly sealed on the back of the main control board by an anti-spying protective mechanism. The anti-spying protection mechanism is electrically connected with the control circuit. The anti-spying protection mechanism comprises: an anti-spying cover () having a bottom surface () and a side wall () extending perpendicularly along the edge thereof, the side wall () together with the bottom surface () forming a first cavity (); a rigid anti-spying circuit board () being placed inside the first cavity (), and a second cavity () being formed by a bottom side and a side wall with the circular edge, the bottom side of the second cavity () is provided with at least one pair of connecting fingers () for the anti-spying circuit (); and a conductive adhesive () placed inside the second cavity () to make the connecting fingers () on the rigid anti-spy circuit board () and the connecting fingers () on the control circuit of the main control board connect electrically.

Anti-spying encrypted keyboard

An enhanced encryption keypad () capable of preventing illegal disassembly for an automated teller machine comprises a key panel () and a main control board (). A removal detection protection circuit is disposed inside a main chip of the main control board (), and at least one pin of the removal detection protection circuit is guided out from a surface () of a side of the main control board () near the key panel to form a removal detection point (). The removal detection point () has two opened signal contact points. The two opened signal contact points are conducted by a conductive adhesive () to activate the removal detection protection circuit. A conductive protection ring () isolated from the removal detection point is disposed at the periphery of the removal detection point. The conductive protection ring () is connected to the removal detection protection circuit inside the main control chip. A protection circle () is disposed at the periphery of the conductive protection ring and the corresponding conductive adhesive. The present application effectively protects the encryption keypad from illegal attacks on the removal detection point from the side.

Encryption keypad capable of preventing illegal disassembly

An pry-proof encrypted keyboard. The encrypted keyboard comprises a keyboard panel (), a lining board () assembled under the keyboard panel (), a waterproof silicon rubber () and a main control panel (). Convex rib circles () are provided on the circumference of the surface of the lining board () attached with the waterproof silicon rubber (). The waterproof silicon rubber is extruded by the lining board () when the encrypted keyboard is assembled, and the thickness of corresponding waterproof silicon rubber () extruded by the convex rib circles () is less than 0.2 MM. The metallic lining board () can efficiently prevent fusion attack from the lateral face of the encrypted keyboard, meanwhile two convex rib circles () are added on the circumference of the surface of the lining board attached with the water silicon rubber (), so that the thickness of the waterproof silicon rubber () at the grooves () is less than 0.2 MM, which is the diameter of the known thinnest needle, thus the attackers could not easily breakthrough the lining board () or the waterproof silicon rubber () to reach the inside of the encrypted keyboard, as a result illegally leading the wire out from the inside of the encrypted keyboard is efficiently prevented, thus the information of the keyboard is efficiently protected, and the security performance is improved.

Growing community of inventors

Guangzhou, China

Zhulong Lin