Prevent to carry out safety arrangement that steals secret information through button on mainboard contact

The utility model discloses a prevent to carry out safety arrangement that steals secret information through button on mainboard contact, the MCU who is equipped with digital district button contact and takes measuring and self -destruct circuit on the mainboard, the snap dome conductive film covers on the mainboard, is equipped with the protection circuit board of the electrically conductive silver -colored circuit in area between snap dome conductive film and keyboard, among the electrically conductive detection circuitry of silver -colored line connection in MCU, be equipped with the protection contact of a plurality of connections in detection circuitry on the mainboard, compressed tightly on the mainboard around protecting the circuit board bottom to be provided with a plurality of connecting terminals that correspond with each protection contact, protect the circuit board after the keyboard installation, make each connecting terminal contact with each protection contact respectively and switch on to make detection circuitry switch on. Silver -colored circuit opens circuit or arbitrary connecting terminal and protection contact separation if electrically conduct, makes the detection circuitry disconnection, and MCU will start the self -destruct circuit and clear away the data of saving among the MCU, the utility model has the advantages that: improve financial payment terminal equipment's safe performance.