Mobile devices, terminal devices, and authentication methods thereof

1. A mobile device, having a hardware identify number, comprising:

a touch panel, comprising at least one transmitting electrode and at least one receiving electrode, wherein the transmitting electrode performs signal transmission using a touch-link technology, and the receiving electrode performs signal reception using the touch-link technology; and

a processing unit, configured to receive encrypted data and a security code of a server from a terminal device via the receiving electrode, parse the security code to determine whether the security code matches a predefined content, launch an application program associated with the server to decrypt the encrypted data according to the hardware identification number and generate decrypted data when the security code matches the predefined content, and transmit the decrypted data with the security code to the terminal device via the transmitting electrode, thereby enabling the terminal device to transmit the decrypted data to the server to assist the mobile device with obtaining a log-in access or transaction authorization of the server.

2. The mobile device of claim 1 , wherein the processing unit further transmits the hardware identification number to the terminal device via the transmitting electrode, thereby enabling the terminal device to transmit the hardware identification number to the server for registering the mobile device with the server, and the encrypted data is generated by the server using the hardware identification number as an encryption key.

3. The mobile device of claim 1 , wherein the encrypted data is received with Multipurpose Internet Mail Extensions (MIME) data of the server from the terminal device, and the processing unit further determines whether to launch the application program according to the MIME data.

4. A terminal device, comprising:

a communication unit, configured to provide a connection to a server via the Internet;

a touch panel, comprising at least one transmitting electrode and at least one receiving electrode, wherein the transmitting electrode performs signal transmission using a touch-link technology, and the receiving electrode performs signal reception using the touch-link technology; and

a processing unit, configured to receive encrypted data from the server via the communication unit, transmit the encrypted data and a first security code of the server to a mobile device via the transmitting electrode, receive decrypted data and a second security code from the mobile device via the receiving electrode, wherein the decrypted data is derived from the encrypted data, determine whether the first security code is identical with the second security code, transmit the decrypted data to the server via the communication unit when the first security code is identical with the second security code, so as to assist the mobile device with obtaining a log-in access or transaction authorization of the server.

5. The terminal device of claim 4 , wherein the processing unit further receives a hardware identification number of the mobile device via the receiving electrode, prior to receiving the encrypted data, and registers the hardware identification number with the server via the communication unit.

6. The terminal device of claim 5 , wherein the encrypted data is generated by encrypting digital data with the hardware identification number, and the terminal device obtains the log-in access or transaction authorization when the decrypted data is identical with the digital data.

7. The terminal device of claim 4 , wherein the encrypted data is transmitted with Multipurpose Internet Mail Extensions (MIME) data of the server to the mobile device.