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Title:
TERMINAL DEVICE FOR PERFORMING HOMOMORPHIC ENCRYPTION, SERVER DEVICE FOR PROCESSING CIPHER TEXT THEREOF, AND METHODS THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/117694
Kind Code:
A1
Abstract:
Disclosed is an encryption method. According to the present method, a homomorphic cipher text can be generated by using a public key after reflecting a scaling factor to a message. The generated cipher text is generated in the form in which a result value is restored when decrypted, wherein the result value is a value in which an error value is added to a value in which the scaling factor is reflected to the message. Accordingly, it is possible to effectively generate a homomorphic cipher text which can be operated in an encrypted state.

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Inventors:
CHEON JUNG HEE (KR)
KIM DUHYEONG (KR)
SONG YONGSOO (US)
HAN KYOOHYUNG (KR)
Application Number:
PCT/KR2018/016060
Publication Date:
June 20, 2019
Filing Date:
December 17, 2018
Export Citation:
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Assignee:
SEOUL NAT UNIV R&DB FOUNDATION (KR)
CRYPTO LAB INC (KR)
International Classes:
H04L9/00; H04L9/06
Foreign References:
EP2317689A22011-05-04
KR20140095179A2014-08-01
KR20170122458A2017-11-06
KR20150122513A2015-11-02
Other References:
FAN JUNFENG: "Somewhat practical fully homomorphic encryption", IACR CRYPTOLOGY EPRINT ARCHIVE, 2012, pages 1 - 19, XP061006008
Attorney, Agent or Firm:
KIM, Tae-hun (KR)
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