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:
Apr. 21, 2026
Filed:
Apr. 17, 2024
Axell Corporation, Tokyo, JP;
Yusuke Hoshizuki, Tokyo, JP;
Kotaro Matsuoka, Tokyo, JP;
AXELL CORPORATION, Tokyo, JP;
Abstract
An encryption processing apparatus processes a ciphertext. The ciphertext is a fully homomorphic cyphertext that has, as a plaintext associated with an integer, a value obtained by adding an error with a predetermined variance to a predetermined value and that is able to be subjected to a predetermined operation between integers without being decrypted. The apparatus includes a processor that performs a calculation process of applying a predetermined polynomial to a ciphertext. The calculation process performs a first process of reducing an error of an input ciphertext by using the predetermined polynomial and a second process of extracting the new ciphertext from a ciphertext obtained as a result of the first process. The calculation process computes the new ciphertext that is different in input value at high speed by performing the second process a plurality of number of times on the ciphertext obtained as the result of the first process.