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:
Dec. 31, 2019
Filed:
Apr. 27, 2017
ID Quantique, Genève, CH;
Jeongwoon Choi, Seoul, KR;
ID Quantique, Genève, CH;
Abstract
A method and apparatus for synchronizing a start-point of quantum data are disclosed. A method of determining a start-point of a quantum key distribution (QKD) protocol, at which a receiving apparatus of a QKD system starts the QKD protocol with a transmitting apparatus, includes receiving, by the receiving apparatus, an optical pulse sequence of a predetermined pattern from the transmitting apparatus, measuring, by the receiving apparatus, a predetermined quantum signal included in the optical pulse sequence, transmitting, by the receiving apparatus, a confirmation signal to the transmitting apparatus when the number of measurements of the predetermined quantum signal reaches a predetermined value, and determining, as the start-point, a point after one period of the optical pulse sequence from a point at which the number of measurements of the predetermined quantum signal has reached the predetermined value, or a point at which the confirmation signal has been transmitted.