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:
Aug. 12, 2025
Filed:
Jun. 04, 2021
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Hiroki Sudo, Musashino, JP;
Dai Ikarashi, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A concealed operation result indicating concealed information of an Intersect operation result of X and Y is obtained while X={{x, . . . , x}} and Y={{y, . . . , y}} are concealed. A secure computation device obtains a sequence ([s], [M]) including [s] including n [B] and m [B] and [M] including [x], . . . , [x] and [y], . . . , [y], performs stable sorting on the sequence ([s], [M]) according to an order relationship of content represented by each of the elements M, . . . , Mto obtain a sequence ([s'], [M′]), obtain [eq] where eq=T when M′=M′and eq=F otherwise and [seq] where seq=T when s′=s′and seq=F otherwise, obtain [f] where f=Dwhen eq=T and seq=F and f=Dotherwise, and outputs [f] and [M′]. Where, [α] is concealed information of α.