Patents by Inventor Haeng-Seok KO
Haeng-Seok KO 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).
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Patent number: 11316677Abstract: 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.Type: GrantFiled: October 13, 2020Date of Patent: April 26, 2022Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Haeng-Seok Ko, Se Wan Ji, Younchang Jeong, Osung Kwon, Seok Kim, Eun Ji Kim, Changho Hong, Jingak Jang, Daesung Kwon
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Publication number: 20220006627Abstract: 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.Type: ApplicationFiled: October 13, 2020Publication date: January 6, 2022Inventors: Haeng-Seok KO, Se Wan JI, Younchang JEONG, Osung KWON, Seok KIM, Eun Ji KIM, Changho HONG, Jingak JANG, Daesung KWON
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Publication number: 20210372851Abstract: 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.Type: ApplicationFiled: July 20, 2020Publication date: December 2, 2021Inventors: Seok KIM, Eun Ji KIM, Younchang JEONG, Osung KWON, Changho HONG, Se Wan JI, Haeng-Seok KO, Jingak JANG, Daesung KWON
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Patent number: 11187578Abstract: 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.Type: GrantFiled: July 20, 2020Date of Patent: November 30, 2021Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Seok Kim, Eun Ji Kim, Younchang Jeong, Osung Kwon, Changho Hong, Se Wan Ji, Haeng-Seok Ko, Jingak Jang, Daesung Kwon
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Patent number: 10958439Abstract: 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.Type: GrantFiled: November 8, 2018Date of Patent: March 23, 2021Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Changho Hong, Nayoung Kim, Osung Kwon, Se Wan Ji, Haeng-Seok Ko, Jingak Jang, Daesung Kwon
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Patent number: 10958428Abstract: 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 state; 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.Type: GrantFiled: November 14, 2016Date of Patent: March 23, 2021Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Chang-Ho Hong, Na-Young Kim, O-Sung Kwon, Youn-Chang Jeong, Haeng-Seok Ko, Jin-Gak Jang, Dae-Sung Kwon
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Patent number: 10887094Abstract: 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.Type: GrantFiled: July 23, 2018Date of Patent: January 5, 2021Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Se Wan Ji, Changho Hong, Younchang Jeong, Osung Kwon, Haeng-Seok Ko, Jingak Jang, Daesung Kwon
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Patent number: 10778420Abstract: 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.Type: GrantFiled: May 16, 2018Date of Patent: September 15, 2020Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Changho Hong, Nayoung Kim, Osung Kwon, Se Wan Ji, Haeng-Seok Ko, Jingak Jang, Daesung Kwon
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Patent number: 10567169Abstract: 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.Type: GrantFiled: February 16, 2017Date of Patent: February 18, 2020Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Changho Hong, Nayoung Kim, Osung Kwon, Younchang Jeong, Haeng-Seok Ko, Jingak Jang, Daesung Kwon
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Publication number: 20190327095Abstract: 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.Type: ApplicationFiled: November 8, 2018Publication date: October 24, 2019Inventors: Changho HONG, Nayoung KIM, Osung KWON, Se Wan JI, Haeng-Seok KO, Jingak JANG, Daesung KWON
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Publication number: 20190238326Abstract: 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.Type: ApplicationFiled: July 23, 2018Publication date: August 1, 2019Inventors: Se Wan JI, Changho HONG, Younchang JEONG, Osung KWON, Haeng-Seok KO, Jingak JANG, Daesung KWON
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Publication number: 20190123896Abstract: 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.Type: ApplicationFiled: May 16, 2018Publication date: April 25, 2019Inventors: Changho HONG, Nayoung KIM, Osung KWON, Se Wan JI, Haeng-Seok KO, Jingak JANG, Daesung KWON
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Publication number: 20180069698Abstract: 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.Type: ApplicationFiled: February 16, 2017Publication date: March 8, 2018Inventors: Changho HONG, Nayoung KIM, Osung KWON, Younchang JEONG, Haeng-Seok KO, Jingak JANG, Daesung KWON
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Publication number: 20170338952Abstract: 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.Type: ApplicationFiled: November 14, 2016Publication date: November 23, 2017Inventors: Chang-Ho HONG, Na-Young KIM, O-Sung KWON, Youn-Chang JEONG, Haeng-Seok KO, Jin-Gak JANG, Dae-Sung KWON
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Publication number: 20150339053Abstract: An apparatus and a method for creating an input value which a user intends to input on a virtual keyboard having a user-friendly key arrangement are disclosed. The method for creating an input value on a virtual keyboard includes: creating the virtual keyboard corresponding to a key arrangement of a user terminal; setting a position of a start key on the virtual keyboard; sensing that a user clicks the start key; confirming a moving distance of a user's hand from the start key; and creating an input key value which the user intends to finally input using the moving distance and the position of the start key.Type: ApplicationFiled: August 28, 2014Publication date: November 26, 2015Inventors: Yongdae KIM, Haeng Seok KO, Sangwoo PARK, Hyuk Joong YOON, Hee Bong CHOI
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Publication number: 20150302208Abstract: An apparatus and method that generate a trigger signal required for side channel analysis by analyzing the data of a smart card cryptographic module in real time. In the trigger signal generation method, a data input/output signal of a cryptographic module is monitored in real time. A preset section in the data input/output signal is analyzed. A reference signal is generated using the data input/output signal and a signal obtained from results of analysis of the preset section, and a trigger signal is generated using the reference signal.Type: ApplicationFiled: September 2, 2014Publication date: October 22, 2015Inventors: Yongdae KIM, Seon-yeong PARK, Hee Bong CHOI, Haeng Seok KO, Sangwoo PARK
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Publication number: 20150193453Abstract: A method and apparatus for storing waveform data are disclosed. The apparatus for storing waveform data includes a channel information reception unit, a folder generation unit, a file generation unit, and an analysis information control unit. The channel information reception unit receives waveform data from an external measuring device. The folder generation unit generates a high level folder for each waveform measurement unit of the waveform data, and generates low level folders, in which information of each channel is stored, for the generated corresponding high level folder. The file generation unit generates waveform data files to be stored in the low level folders. The analysis information control unit stores a text file, corresponding to analysis information necessary for subchannel analysis, in the high level folder.Type: ApplicationFiled: August 27, 2014Publication date: July 9, 2015Inventors: Yongdae KIM, Sang-Yun HAN, Jong Tai LEE, Haeng Seok KO, Sangwoo PARK
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Publication number: 20150088446Abstract: An apparatus and method for selecting a waveform for side-channel analysis are provided. The apparatus for selecting a waveform for side-channel analysis includes a matrix generation unit, a waveform transform unit, and a waveform selection unit. The matrix generation unit generates covariance matrices based on waveforms collected by a waveform collection apparatus. The waveform transform unit determines a 1st principal component using the generated covariance matrices, and to transform the waveforms using the determined 1st principal component. The waveform selection unit selects a waveform for the side-channel analysis from the transformed waveforms.Type: ApplicationFiled: July 25, 2014Publication date: March 26, 2015Inventors: Yongdae KIM, Hyuk Joong YOON, Hee Bong CHOI, Haeng Seok KO, Sangwoo PARK
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Patent number: 8972470Abstract: A method of generating a random number using nonvolatile memory and an apparatus for the same are provided. The method of generating a random number includes reading random number state information from nonvolatile memory when power is supplied; updating the random number state of a random number generator using the random number state information and a saving entropy source, thereby producing updated random number state information; storing the updated random number state information in the nonvolatile memory; updating a random number state of the random number generator using the updated random number state information and a generating entropy source, thereby producing a generating random number state information; and producing a random number to be used in an application program using the generating random number state information and the generating entropy source.Type: GrantFiled: August 27, 2012Date of Patent: March 3, 2015Assignee: Electronics and Telecommunications Research InstituteInventors: Dae-Seon Park, In-Seok Kang, Haeng-Seok Ko, Byeong-Ho Ahn
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Patent number: 8811609Abstract: An information protection system includes a mobile terminal and an encryption module. The mobile terminal requests a key sequence by transmitting a message including a Personal Identification Number (PIN) number input by a user, and encrypts or decrypts one or more communication signals, including voice signals and data signals, based on the key sequence when the key sequence is received. The encryption module is connected to the mobile terminal. The encryption module encrypts a security key using the identifier and the PIN number of the mobile terminal, decrypts the encrypted security when requested by the mobile terminal, and transmits the key sequence generated based on the decrypted security key to the mobile terminal.Type: GrantFiled: February 15, 2012Date of Patent: August 19, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Sang-Hyun Park, Jun-Ho Lee, Haeng-Seok Ko, Myung-Won Seo, In-Jung Kim, Jang-Hong Yoon