System and method for authentication

1. A system for authentication comprising:

a service server configured to:

receive a first authentication request message from an authentication server; and

convert a random number included in the first authentication request message into an optical code;

a first user terminal configured to receive the optical code from the service server and display the optical code; and

a second user terminal configured to:

recognize the random number by capturing an image of the displayed optical code in response to receiving a second authentication request message from the service server; and

authenticate a user by using the random number, the second authentication request message, and biometric information of the user.

2. The system of claim 1 , wherein the service server is further configured to generate the second authentication request message by excluding the random number from the first authentication request message.

3. The system of claim 2 , wherein the second user terminal is further configured to acquire the first authentication request message by adding the recognized random number to the second authentication request message.

4. The system of claim 1 , wherein the optical code comprises at least one from among a QR code and a barcode.

5. The system of claim 1 , wherein the second user terminal is a mobile device.

6. A method of authentication comprising:

receiving, at a service server, a first authentication request message from an authentication server;

converting, at the service server, a random number included in the first authentication request message into an optical code;

receiving, at a first user terminal, the optical code from the service server;

displaying, at the first user terminal, the optical code;

recognizing, at a second user terminal, the random number by capturing an image of the displayed optical code in response to receiving a second authentication request message from the service server; and

authenticating, at the second user terminal, a user by using the random number, the second authentication request message, and biometric information of the user.

7. The method of claim 6 , further comprising, after the receiving of the first authentication request message, generating, at the service server, the second authentication request message by excluding the random number from the first authentication request message.

8. The method of claim 7 , further comprising, before the authenticating of the user, acquiring, at the second user terminal, the first authentication request message by adding the recognized random number to the second authentication request message.

9. The method of claim 6 , wherein the optical code comprises at least one from among a QR code and a barcode.

10. The method of claim 6 , wherein the second user terminal is a mobile device.

11. A service server comprising:

a data receiver configured to receive a first authentication request message from an authentication server;

a data processor configured to:

convert a random number included in the first authentication request message into an optical code; and

generate a second authentication request message by excluding the random number from the first authentication request message; and

a data transmitter configured to transmit the optical code to a first user terminal and transmit the second authentication request message to a second user terminal.

12. The service server of claim 11 , wherein the optical code comprises at least one from among a QR code and a barcode.

13. The service server of claim 11 , wherein the second user terminal is a mobile device.

14. A method of authentication comprising:

receiving, at a data receiver, a first authentication request message from an authentication server;

converting, at a data processor, a random number included in the first authentication request message into an optical code;

generating, at the data processor, a second authentication request message by excluding the random number from the first authentication request message; and

transmitting, by a data transmitter, the optical code to a first user terminal, and transmitting, by the data transmitter, the second authentication request message to a second user terminal.

15. The method of claim 14 , wherein the optical code comprises at least one from among a QR code and a barcode.

16. The method of claim 14 , wherein the second user terminal is a mobile device.