Quantum key distribution system and method based on quantum true random numbers

Abstract

The invention discloses a quantum key distribution system based on quantum true random numbers. A quantum state measurement module is used for measuring quantum states of quantum light sources received from quantum channels by employing random numbers generated by a receiving end and the frequency same to that of a sending end quantum light source; a receiving end master control module is also used for numbering each time of measurement of the quantum state measurement module; a postprocessing module is used for carrying out basic information comparison on measurement results through classical channels according to a BB84 protocol; and the postprocessing module also is used for partially disclosing a key after the basic information comparison, estimates a bit error rate of this time of communication and carries out correction and secret keeping amplification processing on the surplus key, thereby enabling a transmitting end master control module and the receiving end master control module to generate and output the same safety key. The invention also discloses a quantum key distribution method based on the quantum true random numbers. According to the system, the difficult problem that the true random numbers are not employed in an existing high-speed quantum key distribution system is solved, and the true random number barrier of the quantum key distribution system with the higher speed in the future is removed.

Description

technical field [0001] The invention relates to a quantum key distribution system solution using quantum true random numbers, in particular to a quantum key distribution system and method based on quantum true random numbers using quantum true random number quantum state preparation and quantum state measurement. Background technique [0002] A true random number sequence refers to a completely unpredictable random number sequence obtained from an actual random physical process, and has no periodicity; a pseudo-random number sequence refers to a sequence of random numbers obtained through a certain algorithm and has random number characteristics within a certain period is not a true sequence of random numbers. In practical applications, usually pseudo-random number sequences can meet most application requirements, but in some special fields, such as quantum key distribution systems, completely unpredictable true random number sequences are required. Quantum key distribution...

AI Technical Summary

Problems solved by technology

Traditional commercial true random number generator chips pay more attention to the quality of true random numbers rather than speed, which cannot meet the needs of the QKD system; using a large number of chips in parallel to increase the production code rate will lead to too large equipment volume, which is not compatible with the miniaturization and integration of the QKD system contrary to the development needs of

At present, the maximum generation rate of commercial true random number generators does not exceed 100Mbps, while the decoy state GHZ high-speed quantum key distribution system requires real-time true random numbers of nearly 10Gbps, and with the development of technology, the speed of quantum key distribution system is still increasing With the improvement of real-time true random numbers, the rate of real-time true random numbers is also continuously improved. The existing commercial true random numbers are far from meeting the needs of the system, so true random number generators restrict the development of high-speed quantum key distribution systems. The high-speed quantum random numbers developed in recent years are meeting the needs of high-speed quantum key distribution systems

Images