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:
Oct. 14, 2025
Filed:
Oct. 18, 2022
Seoul National University R&db Foundation, Seoul, KR;
Industry-academic Cooperation Foundation, Chosun University, Gwangju, KR;
Joon-Woo Lee, Seoul, KR;
Jong-Seon No, Seoul, KR;
Yong-Woo Lee, Seoul, KR;
Seung-Jae Chae, Seoul, KR;
Young-Sik Kim, Seoul, KR;
SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul, KR;
INDUSTRY-ACADEMIC COOPERATION FOUNDATION, CHOSUN UNIVERSITY, Gwangju, KR;
Abstract
A method of performing a homomorphic permutation by a server includes: generating, via a ciphertext generation portion, a first ciphertext by adding noise to the basic ciphertext; transmitting, via a transmission portion, the first ciphertext to a client; performing, via an operation portion, a predetermined operation on the noise; receiving, via a reception portion, a second ciphertext from the client; and extracting, via an extraction portion, the basic ciphertext on which the predetermined operation is performed, by removing, from the second ciphertext, the noise on which the predetermined operation is performed, wherein the second ciphertext is a ciphertext that is re-encrypted by the client after decrypting the first ciphertext and performing the predetermined operation on the decrypted first ciphertext.