Patents by Inventor Kyong Chun Lim

Kyong Chun Lim 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).

  • Continuous variable quantum key distribution phase compensation system
    Patent number: 11212086
    Abstract: The present invention, which is used for continuous variable quantum key distribution (CVQKD) with asynchronous local oscillators, relates to a system for performing a phase compensation of a scheme of using LO phase estimation and feedback at a receiver (Bob) using a pilot signal from a transmitter (Alice) and a scheme of measuring quantum state data using an LO having a predetermined phase at the receiver (Bob) and estimating and feeding back an LO phase through multi-dimensional reconciliation (MDR).
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: December 28, 2021
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: June Koo Rhee, Ii Hwan Park, Kyong Chun Lim, Jun Sang Oh, Yong Seen Kim
  • Method and apparatus for quantum key distribution on basis of photon subtraction from receiver
    Patent number: 11133928
    Abstract: The present invention relates to a method and an apparatus for quantum key distribution according to a continuous-variable quantum key distribution protocol, which distributes the quantum key in a reverse post-processing manner and, after photon sub traction at a receiver (Bob), detects bit information from a received quantum state to calculate and share the quantum key, such that security can be further enhanced and a cryptographic key generation rate can be increased since the cryptographic key is not exposed to an attacker (Eve).
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: September 28, 2021
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: June Koo Rhee, Kyong Chun Lim, Chang Ho Suh
  • Continuous Variable Quantum Key Distribution Phase Compensation System
    Publication number: 20200304300
    Abstract: The present invention, which is used for continuous variable quantum key distribution (CVQKD) with asynchronous local oscillators, relates to a system for performing a phase compensation of a scheme of using LO phase estimation and feedback at a receiver (Bob) using a pilot signal from a transmitter (Alice) and a scheme of measuring quantum state data using an LO having a predetermined phase at the receiver (Bob) and estimating and feeding back an LO phase through multi-dimensional reconciliation (MDR).
    Type: Application
    Filed: April 13, 2018
    Publication date: September 24, 2020
    Inventors: June Koo Rhee, Il Hwan Park, Kyong Chun Lim, Jun Sang Oh, Yong Seen Kim
  • Method and Apparatus for Quantum Key Distribution on Basis of Photon Subtraction from Receiver
    Publication number: 20200195428
    Abstract: The present invention relates to a method and an apparatus for quantum key distribution according to a continuous-variable quantum key distribution protocol, which distributes the quantum key in a reverse post-processing manner and, after photon sub traction at a receiver (Bob), detects bit information from a received quantum state to calculate and share the quantum key, such that security can be further enhanced and a cryptographic key generation rate can be increased since the cryptographic key is not exposed to an attacker (Eve).
    Type: Application
    Filed: January 4, 2018
    Publication date: June 18, 2020
    Inventors: June Koo Rhee, Kyong Chun Lim, Chang Ho Suh