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:
Sep. 01, 2026
Filed:
Jul. 29, 2021
Nec Corporation, Tokyo, JP;
Hiroto Tamiya, Tokyo, JP;
Toshiyuki Isshiki, Tokyo, JP;
Kengo Mori, Tokyo, JP;
Sanami Nakagawa, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A homomorphic cyclic operation system performs a homomorphic cyclic operation on a periodic array of data using homomorphic encryption having a homomorphic operation defined with respect to at least one multiplication and comprises: an encryption apparatus that encrypts the periodic array of data by storing it in the coefficients of an indeterminate polynomial to generate a ciphertext of periodic data; and a homomorphic cyclic operation apparatus that shifts the periodic array of data in the ciphertext of the periodic data by applying the indeterminate raised to the power of a shift amount to the ciphertext of the periodic data.