公开(公告)号：US11722290B2

公开(公告)日：2023-08-08

申请号：US17678596

申请日：2022-02-23

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jieun Eom ,  Andrey Kim ,  Deriabin Maksim ,  Rakyong Choi ,  Whan Ghang ,  Dong-Hoon Yoo ,  Yongwoo Lee

IPC: H04L29/06 ,  H04L9/00 ,  H04L9/08 ,  H04L9/30

CPC classification number: H04L9/008 ,  H04L9/085 ,  H04L9/3026

Abstract: Disclosed is a method and apparatus for modulus refresh, where the method for modulus refresh of a ciphertext in homomorphic encryption includes receiving a first ciphertext corresponding to a first modulus, generating a second ciphertext by performing a blind rotation on the first ciphertext, and generating a target ciphertext corresponding to a second modulus greater than the first modulus based on the first ciphertext and the second ciphertext.