Electronics and Telecommunications Research Institute

O-Sung Kwon

Haeng-Seok Ko

Jin-Gak Jang

Chang-Ho Hong

Dae-Sung Kwon

Youn-Chang Jeong

Na-Young Kim

Seok Ki Kim

Eun-Ji Kim

Se-Wan Ji

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.

Apparatus and method for mutual authentication of quantum entities based on measurement-device-independent quantum key distribution

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.

Apparatus for quantum key distribution on a quantum network and method using the same

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Daejeon, South Korea

O-Sung Kwon