US 12,425,182 B2
Apparatus and method with homomorphic encryption
Rakyong Choi, Suwon-si (KR); Andrey Kim, Suwon-si (KR); Yongwoo Lee, Suwon-si (KR); Maksim Deriabin, Suwon-si (KR); and Jieun Eom, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Nov. 30, 2023, as Appl. No. 18/524,573.
Claims priority of application No. 10-2023-0035315 (KR), filed on Mar. 17, 2023.
Prior Publication US 2024/0313944 A1, Sep. 19, 2024
Int. Cl. H04L 29/06 (2006.01); H04L 9/00 (2022.01); H04L 9/30 (2006.01)
CPC H04L 9/008 (2013.01) [H04L 9/3093 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A processor-implemented method for performing a homomorphic encryption operation, the method comprising:
generating a second ciphertext, having a second total number of dimensions, by performing a key switching operation using a key-switching key to generate the second ciphertext, encrypted by a second secret key, based on a homomorphic encrypted first ciphertext on a first modulus encrypted by a first secret key, where the first ciphertext has a first total number of dimensions; and
generating a ciphertext on a second modulus by performing a blind rotation operation based on the second ciphertext and an operation key.