公开(公告)号：US20190238326A1

公开(公告)日：2019-08-01

申请号：US16041994

申请日：2018-07-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Se Wan JI ,  Changho HONG ,  Younchang JEONG ,  Osung KWON ,  Haeng-Seok KO ,  Jingak JANG ,  Daesung KWON

IPC: H04L9/08

CPC classification number: H04L9/0858 ,  H04L9/0819 ,  H04L9/0861

Abstract: An authentication apparatus and method for quantum cryptography communication. The quantum cryptography communication authentication method is performed using quantum cryptography communication authentication apparatuses, and includes transmitting, by a first quantum cryptography communication authentication apparatus, a quantum state to a second quantum cryptography communication authentication apparatus by selecting a first basis, and measuring, by the second quantum cryptography communication authentication apparatus, the quantum state by selecting a second basis, and performing, by the first quantum cryptography communication authentication apparatus and the second quantum cryptography communication authentication apparatus, authentication by revealing the first basis and the second basis and by comparing sifted keys generated from a common basis between the first basis and the second basis with each other.

公开(公告)号：US20210372851A1

公开(公告)日：2021-12-02

申请号：US16933261

申请日：2020-07-20

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seok KIM ,  Eun Ji KIM ,  Younchang JEONG ,  Osung KWON ,  Changho HONG ,  Se Wan JI ,  Haeng-Seok KO ,  Jingak JANG ,  Daesung KWON

IPC: G01J1/44

Abstract: A single-photon detection method and apparatus. The single-photon detection method detects a single photon using a single-photon detection apparatus, and includes generating an output signal through a photon detector by receiving a light signal as an input, generating a negative voltage comparison result through a negative voltage comparator by receiving the output signal as an input, and generating a photon detection result based on the negative voltage comparison result.

公开(公告)号：US20240421985A1

公开(公告)日：2024-12-19

申请号：US18378295

申请日：2023-10-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： O-Sung KWON ,  Jin-Gak JANG ,  Haeng-Seok KO ,  Dae-Sung KWON ,  Youn-Chang JEONG ,  Se-Wan JI ,  Seok KIM ,  Chang-Ho HONG

IPC: H04L9/08

Abstract: Disclosed herein is a quantum key distribution apparatus. The quantum key distribution apparatus includes an optical pulse in which information for private key generation is included is transmitted to multiple receivers, respectively, through different communication paths, and the optical pulse is generated at a speed higher than an optical pulse measurement speed of each of the multiple receivers by a multiple of a number of multiple receivers.

公开(公告)号：US20190123896A1

公开(公告)日：2019-04-25

申请号：US15980919

申请日：2018-05-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Changho HONG ,  Nayoung KIM ,  Osung KWON ,  Se Wan JI ,  Haeng-Seok KO ,  Jingak JANG ,  Daesung KWON

IPC: H04L9/08 ,  H04L9/32 ,  G06N99/00

CPC classification number: H04L9/0852 ,  G06N10/00 ,  H04L9/0869 ,  H04L9/32 ,  H04L9/3228

Abstract: A quantum direct communication with user authentication and an apparatus using the same. The quantum direct communication method includes performing verification of security of a quantum channel using a preset channel verification probability and a quantum state source generated by a receiver of quantum direct communication, performing user authentication using one or more of a preset user authentication probability, the quantum state source, and an authentication key shared between the receiver and a sender, stopping quantum direct communication and resetting the quantum channel when the verification of security of the quantum channel fails, and stopping quantum direct communication when the user authentication fails.

公开(公告)号：US20180069698A1

公开(公告)日：2018-03-08

申请号：US15434188

申请日：2017-02-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Changho HONG ,  Nayoung KIM ,  Osung KWON ,  Younchang JEONG ,  Haeng-Seok KO ,  Jingak JANG ,  Daesung KWON

IPC: H04L9/08 ,  H04L9/14

CPC classification number: H04L9/0858 ,  H04L9/083 ,  H04L9/0869 ,  H04L9/14

Abstract: An apparatus and method for multi-user quantum key distribution. The method for multi-user quantum key distribution is performed using a multi-user quantum key distribution apparatus and a quantum key client device, and includes generating, by the multi-user quantum key distribution apparatus, transmission qubit pairs based on a key bit string of a shared key to be distributed to the quantum key client device, measuring, by the quantum key client device, the transmission qubit pairs, received from the multi-user quantum key distribution apparatus through a quantum channel, based on a measurement basis, verifying security of the quantum channel using the transmission qubit pairs, and if the security has been verified, decoding qubit measurement values of the transmission qubit pairs into the shared key.

公开(公告)号：US20240089124A1

公开(公告)日：2024-03-14

申请号：US18126215

申请日：2023-03-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chang-Ho HONG ,  Se-Wan JI ,  O-Sung KWON ,  Youn-Chang JEONG ,  Eun-Ji KIM ,  Seok KIM ,  Haeng-Seok KO ,  Dae-Sung KWON ,  Jin-Gak JANG

IPC: H04L9/32 ,  H04L9/08

CPC classification number: H04L9/3273 ,  H04L9/085 ,  H04L9/0852

Abstract: Disclosed herein are an apparatus and method for mutual authentication of quantum entities based on Measurement-Device-Independent Quantum Key Distribution (MDI-QKD). The method may include configuring a quantum input form based on an authentication key shared in advance with a counterpart entity, applying polarization modulation to the configured quantum input form, transmitting the quantum input form to which polarization modulation is applied to a quantum measurement device, and authenticating the counterpart entity by checking whether the counterpart entity configures a quantum input form according to the shared authentication key using a measurement result and information about polarization modulation.

公开(公告)号：US20220006627A1

公开(公告)日：2022-01-06

申请号：US17069073

申请日：2020-10-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Haeng-Seok KO ,  Se Wan JI ,  Younchang JEONG ,  Osung KWON ,  Seok KIM ,  Eun Ji KIM ,  Changho HONG ,  Jingak JANG ,  Daesung KWON

IPC: H04L9/08 ,  H04L9/12 ,  H04L9/06 ,  H04L9/14

Abstract: A quantum key distribution (QKD) node apparatus and a QKD method therein. The QKD node apparatus may include a QKD module for generating quantum keys and quantum key IDs, a quantum key synchronization management module for storing the quantum keys and the quantum key IDs as outbound and inbound quantum keys in a distributed manner and sharing the outbound and inbound quantum keys with a second QKD node apparatus, and a quantum key orchestration module for delivering a master key and a master key ID to a secure application connected therewith in response to a request for the master key with the ID of a second secure application and delivering a packet including the master key encrypted with the outbound quantum key shared with the second QKD node apparatus, the master key ID, and a quantum key ID, to the second QKD node apparatus.

公开(公告)号：US20190327095A1

公开(公告)日：2019-10-24

申请号：US16183934

申请日：2018-11-08

Applicant: Electronics and Telecommunications Research Institute

Inventor： Changho HONG ,  Nayoung KIM ,  Osung KWON ,  Se Wan JI ,  Haeng-Seok KO ,  Jingak JANG ,  Daesung KWON

IPC: H04L9/32 ,  G06N99/00 ,  H04L9/06

Abstract: An apparatus and method for a reliable quantum signature. The method using the apparatus for a reliable quantum signature includes preparing a quantum signature by sharing a first secret key and a first Bell state with a signer's terminal device and by sharing a second secret key and a second Bell state with a verifier's terminal device; signing, by the signer's terminal device, a message with the quantum signature using a first encoding value, the first secret key, and the first Bell state; verifying, by the apparatus, the quantum signature of the message using the first encoding value, the first secret key, and the first Bell state; and finally verifying, by the apparatus, the quantum signature of the message using the verifier's terminal device, a second encoding value, a third encoding value, the second secret key, and the second Bell state.

公开(公告)号：US20170338952A1

公开(公告)日：2017-11-23

申请号：US15350376

申请日：2016-11-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chang-Ho HONG ,  Na-Young KIM ,  O-Sung KWON ,  Youn-Chang JEONG ,  Haeng-Seok KO ,  Jin-Gak JANG ,  Dae-Sung KWON

IPC: H04L9/08

CPC classification number: H04L9/0858 ,  H04L9/083

Abstract: A device and method for quantum key distribution (QKD). The QKD center includes an authentication key sharing unit for sharing authentication keys with QKD client devices; a quantum key generation unit for generating a sifted key for each of the QKD client devices using a quantum slate; an error correction unit for generating output bit strings by correcting errors of the sifted keys; and a bit string operation unit for calculating an encryption bit string by performing a cryptographic operation on the authentication keys, the distribution output bit strings and output bit strings received from the QKD client devices. The present invention improves security by preventing the QKD center from being aware of keys shared among users.