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. 06, 2022
Filed:
Aug. 11, 2020
Fujitsu Limited, Kawasaki, JP;
Dai Suzuki, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A communication apparatus configured to acquire information in a distributed ledger shared in a network, the communication apparatus includes a memory; and a processor coupled to the memory and configured to acquire one or more digital certificates used by a user of another apparatus to apply to the communication apparatus from the other apparatus, acquire type information that identifies a combination of the user and the type of information certified by the one or more digital certificates, by using the distributed ledger, acquire certificate issue history that is recorded in the distributed ledger in association with the type information, and determine whether the issue history contains information of another digital certificate that has not been acquired from the other apparatus.