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:
May. 05, 2026
Filed:
Mar. 02, 2022
Applicant:
Ntt, Inc., Tokyo, JP;
Inventors:
Tetsuya Okuda, Tokyo, JP;
Kenji Umakoshi, Tokyo, JP;
Assignee:
NTT, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/14 (2006.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01);
U.S. Cl.
CPC ...
H04L 9/14 (2013.01); H04L 9/088 (2013.01); H04L 9/30 (2013.01);
Abstract
A program execution system includes a data processing apparatus that performs secret calculation in a secure area. The data processing apparatus includes circuitry configured to calculate a result that is obtained by executing a program on data in the secure area, the program being obtained by decrypting a re-encrypted program with a first secret key, and the data being obtained by decrypting re-encrypted data with a second secret key.