The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2019
Filed:
Oct. 30, 2015
Alibaba Group Holding Limited, Grand Cayman, KY;
Yingfang Fu, Beijing, CN;
Shuanlin Liu, Hangzhou, CN;
Yabin Gao, Beijing, CN;
Li Xiao, Hangzhou, CN;
Junying Pang, Hangzhou, CN;
Xiuzhong Chen, Hangzhou, CN;
Liang Feng, Hangzhou, CN;
Alibaba Group Holding Limited, Grand Cayman, KY;
Abstract
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.