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:
Jan. 17, 2023
Filed:
Oct. 27, 2020
Samsung Sds Co., Ltd., Seoul, KR;
Korea Advanced Institute of Science and Technology, Daejeon, KR;
Joo Hee Lee, Seoul, KR;
Duk Jae Moon, Seoul, KR;
Hyo Jin Yoon, Seoul, KR;
Ji Hoon Cho, Seoul, KR;
Eun Kyung Kim, Seoul, KR;
Seong Kwang Kim, Daejeon, KR;
Joo Young Lee, Daejeon, KR;
Jin Cheol Ha, Daejeon, KR;
Won Seok Choi, Daejeon, KR;
SAMSUNG SDS CO., LTD., Seoul, KR;
Korea Advanced Institute of Science and Technology, Daejeon, KR;
Abstract
A method for encryption according to an embodiment includes generating a ciphertext for a secret key that is an integer vector by using an integer-based first homomorphic encryption algorithm, generating a key stream that is the integer vector from a nonce and the secret key by using a key stream generator, encoding the key stream by using a message encoding function of the first homomorphic encryption algorithm, encoding a message that is a real vector by using a message encoding function of a real number-based second homomorphic encryption algorithm, generating a ciphertext for the message by using a result of the encoding of the key stream and a result of the encoding of the message, and transmitting the nonce, the ciphertext for the secret key, and the ciphertext for the message to an apparatus for converting a ciphertext.