Patents by Inventor Whan GHANG

Whan GHANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for modulus refresh in homomorphic encryption
    Patent number: 11722290
    Abstract: Disclosed is a method and apparatus for modulus refresh, where the method for modulus refresh of a ciphertext in homomorphic encryption includes receiving a first ciphertext corresponding to a first modulus, generating a second ciphertext by performing a blind rotation on the first ciphertext, and generating a target ciphertext corresponding to a second modulus greater than the first modulus based on the first ciphertext and the second ciphertext.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: August 8, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jieun Eom, Andrey Kim, Deriabin Maksim, Rakyong Choi, Whan Ghang, Dong-Hoon Yoo, Yongwoo Lee
  • ENCRYPTION KEY GENERATING METHOD, APPRATUS, CIPHERTEXT OPERATION METHOD AND APPARATUS USING THE GENERATED ENCRYPTION KEY
    Publication number: 20220385461
    Abstract: An encryption key generating method and apparatus based on homomorphic encryption, and a ciphertext operation method and apparatus using the generated encrypt key are disclosed. The method of generating an encryption key for performing encryption based on homomorphic encryption includes receiving data, generating a first encryption key and a second encryption key used for encrypting the data based on a secret key, and transmitting the first and second encryption keys.
    Type: Application
    Filed: May 13, 2022
    Publication date: December 1, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jieun EOM, MAKSIM DERIABIN, Andrey KIM, Yongwoo LEE, Rakyong CHOI, Whan GHANG, DONG-HOON YOO
  • METHOD AND APPARATUS FOR MODULUS REFRESH IN HOMOMORPHIC ENCRYPTION
    Publication number: 20220376890
    Abstract: Disclosed is a method and apparatus for modulus refresh, where the method for modulus refresh of a ciphertext in homomorphic encryption includes receiving a first ciphertext corresponding to a first modulus, generating a second ciphertext by performing a blind rotation on the first ciphertext, and generating a target ciphertext corresponding to a second modulus greater than the first modulus based on the first ciphertext and the second ciphertext.
    Type: Application
    Filed: February 23, 2022
    Publication date: November 24, 2022
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jieun EOM, Andrey KIM, Deriabin MAKSIM, Rakyong CHOI, Whan GHANG, Dong-Hoon YOO, Yongwoo LEE