QUANTUM COMMUNICATION DEVICE, QUANTUM COMMUNICATION SYSTEM AND QUANTUM COMMUNICATION METHOD

摘要

According to an arrangement, a quantum communication device (20) includes a corrector (24; 24-1) and a retransmission controller (25). The corrector (24; 24-1) is configured to generate corrected key data by performing error correction on received key data received from a transmitting device through a quantum channel. The retransmission controller (25) is configured to transmit a retransmission request including retransmission target address information to the transmitting device through a control channel when a retransmission request condition is satisfied, and receive retransmission key data corresponding to the retransmission target address information from the transmitting device through the control channel. After receiving the retransmission key data, the corrector (24; 24-2) replaces corrected key data corresponding to the retransmission target address information with the retransmission key data.