Patent ID: 8577394

Claim:
A security management system applied among a mobile device, a server, and an entrance guard device, the security management system comprising: a storage unit configured to store a restricting table, which records relationships between positional information of the mobile device and functions of a mobile phone; and at least one processor comprising: a barcode generating module configured to randomly generate a barcode by the entrance guard device when the mobile device is moved adjacent to the entrance guard device; a display module configured to display the generated barcode on the entrance guard device; a capturing module configured to capture the displayed barcode, and upload the captured barcode to the server by the mobile device; a barcode validating module configured to validate whether the uploaded barcode is the barcode randomly generated by the barcode generating module by the sever; an information module configured to provide positional information of the mobile device when the uploaded barcode is the barcode randomly generated by the barcode generating module; a restricting module configured to generate a restricting instruction according to the provided positional information of the mobile device and the restricting table stored in the storage unit; and a disabling module configured to disable the corresponding functions of the mobile device according to the generated restricting instruction.