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    AUTHENTICATION APPARATUS AND METHOD FOR QUANTUM CRYPTOGRAPHY COMMUNICATION
    1.
    发明申请
    AUTHENTICATION APPARATUS AND METHOD FOR QUANTUM CRYPTOGRAPHY COMMUNICATION 审中-公开

    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.

    QUANTUM ENTITY AUTHENTICATION APPARATUS AND METHOD
    6.
    发明申请
    QUANTUM ENTITY AUTHENTICATION APPARATUS AND METHOD 有权

    公开(公告)号：US20210266157A1

    公开(公告)日：2021-08-26

    申请号：US16887170

    申请日：2020-05-29

    Applicant: Electronics and Telecommunications Research Institute

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

    IPC: H04L9/08 ,  H04B10/70

    Abstract: A quantum entity authentication apparatus and method. The quantum entity authentication apparatus includes a quantum state preparation unit for preparing an authentication quantum state that is generated based on an authentication key previously shared with an entity, a quantum channel verification unit for transmitting a quantum state, generated by performing an operation using a prestored unique operator on the authentication quantum state, to a quantum measurement device, and for verifying security of a quantum channel by using a result of Bell measurement and the authentication quantum state, the result of Bell measurement being revealed by the quantum measurement device for the quantum state, and a quantum entity authentication unit for, when the security of the quantum channel is verified, authenticating the entity using the result of the Bell measurement and the unique operator.

    APPARATUS AND METHOD FOR QUANTUM DIRECT COMMUNICATION USING SINGLE QUBITS
    7.
    发明申请
    APPARATUS AND METHOD FOR QUANTUM DIRECT COMMUNICATION USING SINGLE QUBITS 审中-公开

    公开(公告)号：US20200313879A1

    公开(公告)日：2020-10-01

    申请号：US16554850

    申请日：2019-08-29

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Changho HONG ,  Nayoung KIM ,  Osung KWON ,  Younchang JEONG ,  Se Wan JI ,  Jingak JANG ,  Daesung KWON

    IPC: H04L9/08 ,  G06N10/00

    Abstract: An apparatus and method for quantum direct communication using single qubits. The apparatus includes a quantum state preparation unit for preparing quantum states including a message state prepared using pairs of single qubits based on a bit of a message to be sent to a communication partner, an authentication state prepared using random qubit pairs, and a verification state prepared using random qubit pairs, a quantum state communication unit for transmitting the quantum states to the communication partner and measuring a quantum state of a message received from the communication partner, an authentication unit for authenticating, using the authentication state, the communication partner depending on whether an authentication key previously shared with the communication partner is possessed, a verification unit for verifying security of a quantum channel using the verification state, and a message restoration unit for restoring the received message using the message state.

    APPARATUS AND METHOD FOR RELIABLE QUANTUM SIGNATURE
    8.
    发明申请
    APPARATUS AND METHOD FOR RELIABLE QUANTUM SIGNATURE 审中-公开

    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.

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