Title:
APPARATUS FOR BOOTSTRAP PROCESSING HOMOMORPHIC ENCRYPTED MESSAGE AND METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/204534
Kind Code:
A1
Abstract:
Disclosed is a method of processing an encrypted message. The method of processing an encrypted message includes: performing calculation on a homomorphic encrypted message on an approximate message including an error, and when a proportion of the approximate message in a calculation result encrypted message acquired by the calculation exceeds a threshold value, extending a plain text space of the calculation result encrypted message, in which the extending of the plain text space includes, generating a first intermediate encrypted message by applying a preset bootstrapping calculation to the calculation result encrypted message, generating a second intermediate encrypted message by applying the preset bootstrapping calculation to a subtraction calculation result between the calculation result encrypted message and the first intermediate encrypted message, and generating a homomorphic encrypted message having an extended plain text space by performing a subtraction calculation of the second intermediate encrypted message on the first intermediate encrypted message.
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Inventors:
CHEON JUNG HEE (KR)
BAE YOUNGJIN (KR)
KIM JAEHYUNG (KR)
BAE YOUNGJIN (KR)
KIM JAEHYUNG (KR)
Application Number:
PCT/KR2023/005107
Publication Date:
October 26, 2023
Filing Date:
April 14, 2023
Export Citation:
Assignee:
CRYPTO LAB INC (KR)
International Classes:
H04L9/00; G06F5/01; G06F7/50; G06F7/523; G06F11/14; G06F17/11; H04L9/08
Foreign References:
| US11115182B2 | 2021-09-07 | |||
| US20210297233A1 | 2021-09-23 | |||
| KR102019159B1 | 2019-09-09 | |||
| EP3975471A1 | 2022-03-30 | |||
| CN106452723B | 2017-05-31 |
Attorney, Agent or Firm:
KIM, Tae-hun (KR)
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