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:
Jun. 02, 2026
Filed:
Nov. 15, 2023
Axell Corporation, Tokyo, JP;
Yusuke Hoshizuki, Tokyo, JP;
Kotaro Matsuoka, Tokyo, JP;
AXELL CORPORATION, Tokyo, JP;
Abstract
An encryption processing apparatus processing a ciphertext is disclosed. The ciphertext is a fully homomorphic ciphertext that has a value obtained by adding an error with a predetermined variance to a predetermined value, as a plaintext associated with an integer and that enables a predetermined operation between integers without decryption. The apparatus includes a processor that executes a process including: applying a first polynomial to a first ciphertext to obtain a second ciphertext having a polynomial as a plaintext; performing a homomorphic operation of a ciphertext having a second polynomial as a plaintext for the second ciphertext to obtain a third ciphertext having a polynomial as a plaintext; and applying the third ciphertext as a polynomial to a fourth ciphertext to obtain a fifth ciphertext.