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.

Date of Patent:
Aug. 22, 2023

Filed:

Jul. 11, 2019
Applicants:

Gyotokushiko Co., Ltd., Chiba, JP;

Technical Infrastructure Logic Corporation, Tokyo, JP;

Inventor:

Masahiro Aoki, Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 21/62 (2013.01); H04L 9/40 (2022.01); H04L 67/06 (2022.01);
U.S. Cl.
CPC ...
G06F 21/6227 (2013.01); H04L 63/0838 (2013.01); H04L 63/0846 (2013.01); G06F 2221/2107 (2013.01); H04L 67/06 (2013.01);
Abstract

A method for causing sending and receiving of an encrypted file between a sending user terminal and a receiving user terminal connected via a network to be performed in a secret state via a management server is provided. The sending user terminal encrypts an original file and then fragments the original file into a plurality of divided files, creates a plurality of combined files formed by combining a plurality of the divided files, and distributes and saves the combined files to which restoration information for opening the combines files has been added in a plurality of online storages. The receiving user terminal can open the combined files obtained from the online storages by using the restoration information received from the management server to extract the divided files included in the combined files, and can restore the original file from the divided files.


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