METHOD, APPARATUS, AND SYSTEM FOR QUANTUM KEY DISTRIBUTION, PRIVACY AMPLIFICATION, AND DATA TRANSMISSION

摘要

A method and apparatus for quantum key distribution comprised of a privacy amplification method and device for the quantum key distribution process as well as a data transmission method and system based on quantum keys is provided, wherein the quantum key distribution method includes the following process: obtaining a bit stream of the same basis vector by sending or receiving coding quantum states of random bit streams and comparing those measurements obtained with the measurement basis vector; in accordance with a preset manner, extracting parameter information associated with privacy amplification and initial key information from the bit stream of the same basis vector after error correction; and using the initial key as an input to implement the privacy amplification algorithm based on the parameter information and thereby obtain shared quantum keys. Utilization of the method detailed herein can eliminate security risks in the negotiation of privacy amplification parameters in the alternative channel and effectively improve the security of quantum key distribution processes.

主权项

1. A method of quantum key distribution, said method comprising:
obtaining a bit stream of a same basis vector by sending or receiving quantum states of random bit streams and comparing it with a measurement basis vector; extracting from the obtained bit stream after error correction, parameter information and initial keys associated with privacy amplification according to a preset manner; using the initial keys as input to implement a privacy amplification algorithm to obtain a set of shared quantum keys based on the extracted parameter information.