公开(公告)号：US20240313945A1

公开(公告)日：2024-09-19

申请号：US18525946

申请日：2023-12-01

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Rakyong CHOI ,  Andrey KIM ,  Yongwoo LEE ,  Deriabin MAKSIM ,  Jieun EOM

IPC: H04L9/00 ,  H04L9/08 ,  H04L9/30

CPC classification number: H04L9/008 ,  H04L9/0861 ,  H04L9/3093

Abstract: A computing apparatus and method are provided. A homomorphic encryption operation method includes dividing a ciphertext having a first number of dimensions into a plurality of ciphertexts having a second number of dimensions, converting a secret key of each of the divided ciphertexts to a joint secret key by performing a key switching operation, generating new ciphertexts by applying the joint secret key to the divided ciphertexts, and performing a blind rotation operation based on the generated ciphertexts.

公开(公告)号：US20220376890A1

公开(公告)日：2022-11-24

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: H04L9/00 ,  H04L9/30 ,  H04L9/08

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.