The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2021
Filed:
Jan. 27, 2020
Applicant:
Crypto Lab Inc., Seoul, KR;
Inventors:
Jung Hee Cheon, Seoul, KR;
Duhyeong Kim, Seoul, KR;
Yongsoo Song, San Diego, CA (US);
Kyoohyung Han, Goyang-si, KR;
Assignee:
Crypto Lab Inc., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); H04L 9/30 (2006.01);
U.S. Cl.
CPC ...
H04L 9/008 (2013.01); H04L 9/304 (2013.01); H04L 9/3093 (2013.01);
Abstract
An encryption method of a terminal device includes: setting a scaling factor; and reflecting the scaling factor in a message to be encrypted, and performing encryption using a public key to generate a homomorphic ciphertext. The homomorphic encryption is, based on a decryption being performed, in a form that a result value obtained by adding an error value to a value obtained by reflecting the scaling factor in the message is restored.