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:
Sep. 19, 2023
Filed:
Feb. 22, 2021
Kabushiki Kaisha Toshiba, Tokyo, JP;
Kazuaki Doi, Kawasaki Kanagawa, JP;
Yoshimichi Tanizawa, Yokohama Kanagawa, JP;
Mamiko Kujiraoka, Kawasaki Kanagawa, JP;
Akira Murakami, Tama Tokyo, JP;
Ririka Takahashi, Setagaya Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to an embodiment, an application-key management system includes a plurality of application-key management devices and a comprehensive management device. The application-key management devices each include: a first memory configured to store an application key in one or more separated logical drives for each sharing destination of the application key shared by quantum cryptographic communication; and a first processor coupled to the first memory. The first processor is configured to: receive, from the comprehensive management device, a deletion request of specifying a logical drive storing the application key to be deleted among the logical drives; and delete the application key stored in the logical drive specified by the deletion request.