METHOD AND DEVICE FOR PERFORMING HOMOMORPHIC PERMUTATION

WIPO Patent Application WO/2023/224182

A1

A method of performing a homomorphic permutation via a terminal includes: generating, via a ciphertext generation portion, a first ciphertext, which is modified from a basic 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 after decrypting the first ciphertext received from the client and then performing the predetermined operation on the decrypted first ciphertext.

LEE JOON-WOO (KR)
NO JONG-SEON (KR)
LEE YONG-WOO (KR)
CHAE SEUNG-JAE (KR)
KIM YOUNG-SIK (KR)

PCT/KR2022/016242

November 23, 2023

October 24, 2022

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SEOUL NAT UNIV R&DB FOUNDATION (KR)
UNIV CHOSUN IACF (KR)

H04L9/00; G06F5/01; G06F17/16

US20200252199A1	2020-08-06
US20150124962A1	2015-05-07
US20200327250A1	2020-10-15
US20160191233A1	2016-06-30

WU WEI; LIU JIAN; WANG HUIMEI; HAO JIALU; XIAN MING: "Secure and Efficient Outsourced k-Means Clustering using Fully Homomorphic Encryption With Ciphertext Packing Technique", IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING, IEEE SERVICE CENTRE , LOS ALAMITOS , CA, US, vol. 33, no. 10, 27 January 2020 (2020-01-27), US , pages 3424 - 3437, XP011877117, ISSN: 1041-4347, DOI: 10.1109/TKDE.2020.2969633

Y.P.LEE, MOCK & PARTNERS (KR)

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