Mobile device, authentication device and authentication methods thereof

An authentication device, comprising:

• an image capturing module, being configured to capture a quick response code (QR code) from a mobile device, the QR code storing service data which includes an identification code assigned to the mobile device and a first hardware serial number of the mobile device;
• a wireless communication module, being configured to receive a wireless signal carrying a second hardware serial number;
• and
• a processing module, electrically connected to the image capturing module and the wireless communication module, being configured to determine whether the identification code is valid and determine whether the first hardware serial number is identical to the second hardware serial number after obtaining the service data by decoding the QR code, and determine that the QR code passes authentication when the identification code is valid and the first hardware serial number is identical to the second hardware serial number.

An authentication method for use in an authentication device, the authentication device comprising an image capturing module, a wireless communication module and a processing module, the authentication method comprising the following steps of:

• capturing a quick response code (QR code) from a mobile device via the image capturing module, the QR code storing service data which includes an identification code assigned to the mobile device and a first hardware serial number of the mobile device;
• determining whether the identification code is valid after decoding the QR code to obtain the service data;
• receiving a wireless signal carrying a second hardware serial number via the wireless communication module;
• determining whether the first hardware serial number is identical to the second hardware serial number;
• and
• determining that the QR code passes authentication when the identification code is valid and the first hardware serial number is identical to the second hardware serial number.