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. 09, 2025
Filed:
Nov. 29, 2022
Ntt Docomo, Inc., Tokyo, JP;
Keita Hasegawa, Chiyoda-ku, JP;
Kazuma Nozawa, Chiyoda-ku, JP;
Takuya Doumen, Chiyoda-ku, JP;
Tomohiro Nakagawa, Chiyoda-ku, JP;
Hiroshi Aono, Chiyoda-ku, JP;
Masayuki Terada, Chiyoda-ku, JP;
NTT DOCOMO, INC., Tokyo, JP;
Abstract
In response to a request from a first device (), a management unit () transmits a data encryption key to the first device () through a secure environment between the management unit () and the first device () when integrity of a first application running in an isolated calculation area is verified. The first device () encrypts target data using the data encryption key and transmits encrypted target data to a second device () through the first application. In response to a request from the second device (), the management unit () transmits a data encryption key to the second device () through a secure environment between the management unit () and the second device () when integrity of a second application running in an isolated calculation area is verified. The second device () decrypts the encrypted target data using the data encryption key through the second application.