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:
Jan. 01, 2019
Filed:
Oct. 03, 2016
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Yumi Sakemi, Kawasaki, JP;
Ikuya Morikawa, Kawasaki, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 9/00 (2006.01); H04L 9/06 (2006.01); H04L 9/32 (2006.01);
U.S. Cl.
CPC ...
H04L 63/0861 (2013.01); H04L 9/008 (2013.01); H04L 9/0618 (2013.01); H04L 9/3231 (2013.01);
Abstract
A method of processing a ciphertext, the method includes: acquiring a part of a plurality of encrypted elements included in the ciphertext, each of the plurality of encrypted elements being an encrypted element in which values of a plurality of elements in a multidimensional determination target vector are respectively encrypted by homomorphic encryption; decrypting the acquired part of the plurality of encrypted elements; and determining validity of the determination target vector based on a relationship between at least one value obtained by the decrypting and both of 0 and 1.