	US 12,368,569 B2
	Apparatus and method with homomorphic encryption
Yongwoo Lee, Suwon-si (KR); Andrey Kim, Suwon-si (KR); Maksim Deriabin, Suwon-si (KR); Jieun Eom, Suwon-si (KR); and Rakyong Choi, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Apr. 17, 2023, as Appl. No. 18/301,343.
Claims priority of application No. 10-2022-0126544 (KR), filed on Oct. 4, 2022; and application No. 10-2022-0158554 (KR), filed on Nov. 23, 2022.
Prior Publication US 2024/0121076 A1, Apr. 11, 2024
Int. Cl. H04L 9/08 (2006.01); H04L 9/00 (2022.01); H04L 9/06 (2006.01); H04L 9/16 (2006.01)

CPC H04L 9/008 (2013.01) [H04L 9/0618 (2013.01); H04L 9/16 (2013.01)]

20 Claims

1. An apparatus, comprising:

a receiver; and

a processor configured to:

generate a modulus switch ciphertext by performing modulus switching with respect to data received by the receiver, the modulus switching including mapping a component of an input ciphertext generated from the received data to an odd number;

generate a blind rotated ciphertext by performing a blind rotation operation based on the modulus switched ciphertext; and

generate encrypted data, as a homomorphic encryption operation result, by performing key switching based on the blind rotated ciphertext.