POS (point-of-sales) safety certification device, POS safety certification system and POS device safety certification method

The invention discloses a POS (point-of-sales) safety certification device, a POS safety certification system and a POS device safety certification method. The POS safety certification device comprises a safety certification information acquisition module, a certification information communication module, a master control module and a data channel safety control module; the safety certification information acquisition module is used for acquiring safety certification information of a user; the certification information communication module is used for transmitting the safety certification information of the user to a bank server to perform safety certification and receiving returned safety certification data; the master control module is used for generating a data processing result according to the safety certification data; the data channel safety control module is used for controlling data exchange between the POS safety certification device and external equipment according to the data processing result. Th