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:
Jun. 02, 2026
Filed:
Sep. 13, 2021
Hitachi, Ltd., Tokyo, JP;
Narumi Naito, Tokyo, JP;
Masaki Kubota, Tokyo, JP;
Shinji Murase, Tokyo, JP;
Keiichi Sato, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
A data file encryption transmission/reception system includes a computer with a registration module that encrypts input data files. The registration module includes a string conversion module that configured to convert the data file to be encrypted to string data, a key generation module that configured to generate a common key, and to divide the common key and the string data into first input information and second input information, a common key encryption module is configured to encrypt the first input information with the common key, to thereby generate common key encrypted data, a searchable encryption module that configured to encrypt the second input information in accordance with searchable encryption with a user secret key set in advance, to thereby generate searchable encrypted data and a communication module is configured to register a set of the common key encrypted data and the searchable encrypted data in the data management server.