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:
Nov. 15, 2022
Filed:
Aug. 31, 2017
Nec Corporation, Tokyo, JP;
National Institute of Information and Communications Technology, Tokyo, JP;
National University Corporation Hokkaido University, Sapporo, JP;
Ken-ichiro Yoshino, Tokyo, JP;
Mikio Fujiwara, Tokyo, JP;
Masahide Sasaki, Tokyo, JP;
Akihisa Tomita, Sapporo, JP;
NEC CORPORATION, Tokyo, JP;
NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, Tokyo, JP;
National University Corporation Hokkaido University, Sapporo, JP;
Abstract
A quantum key distribution device is provided with an encoding unit which encodes an optical pulse train; an intensity modulating unit which subjects the encoded optical pulse train to N (where N is an integer at least equal to 3) types of intensity modulation having mutually different intensities, with different timings; and a first key distillation processing unit which generates an encryption key on the basis of a data sequence obtained by removing data obtained from an optical pulse having a specific modulation pattern from a data sequence used by the encoding unit and the intensity modulating unit.