Mobile device having quantum cryptographic security function for mobile commerce, and authentication method

A quantum cryptography communication server, comprising:

• an optical receiver unit configured to receive a series of second quantum signals generated in such a manner that a series of first quantum signals generated by a first quantum filter and sent from a communication device pass through a second quantum filter;
• and
• a processor configured to:
• select the second quantum filter based on a series of randomly generated first quantum states;
• control the optical receiver unit to receive the series of second quantum signals by passing the series of first quantum signals through the second quantum filter;
• generate the series of first quantum states based on random numbers;
• determine a series of second quantum states by using the series of received second quantum signals;
• receive information about the first quantum filter from the communication device;
• send information about the second quantum filter to the communication device;
• and
• generate a secret key in conjunction with the communication device from the series of the determined second quantum states based on the information about the first quantum filter and the information about the second quantum filter;
• and
• perform user authentication in conjunction with the communication device by using the secret key.

A quantum cryptography authentication method for a communication device, the method comprising:

• generating, by a quantum signal generation unit, a series of first quantum signals by using a first quantum filter;
• sending, by an optical transmission unit, the series of first quantum signals to a server;
• and
• selecting, by a processor, the first quantum filter based on a series of randomly generated first quantum states, and controlling the quantum signal generation unit to generate the series of first quantum signals by using the first quantum filter;
• wherein the controlling comprises:
• randomly generating the series of first quantum states based on random numbers;
• sending information about the first quantum filter to the server, receiving information about the second quantum filter from the server, and generating a secret key in conjunction with the server based on the information about the first quantum filter and the information about the second quantum filter;
• and
• performing user authentication in conjunction with the server by using the secret key.

A communication method for a quantum cryptography communication server, the method comprising:

• receiving, by an optical receiver unit, a series of second quantum signals generated in such a manner that a series of first quantum signals generated by a first quantum filter and sent from a communication device pass through a second quantum filter;
• and
• selecting, by a processor, the second quantum filter based on a series of randomly generated first quantum states, and controlling the optical receiver unit to receive the series of second quantum signals by passing the series of first quantum signals through the second quantum filter;
• wherein the controlling comprises:
• generating the series of first quantum states based on random numbers;
• determining a series of second quantum states by using the series of received second quantum signals, receiving information about the first quantum filter from the communication device, sending information about the second quantum filter to the communication device, and generating a secret key in conjunction with the communication device from the series of the determined second quantum states based on the information about the first quantum filter and the information about the second quantum filter;
• and
• performing user authentication in conjunction with the communication device by using the secret key.