Korea Institute of Science & Technology Information

Il Kwon Sohn

Eun Joo Lee

Won Hyuk Lee

Chan Kyun Lee

Kwang Il Bae

The present disclosure according to at least one embodiment provides a quantum key distribution (QKD)-based quantum digital signature method using a trusted node, the QKD-based quantum digital signature method being performed by a trusted node. The method comprises sharing a first secret key with a message-sending node, sharing a second secret key with a message-receiving node, generating a first trusted-node signature by performing a partial QKD process together with the message-sending node, generating a second trusted-node signature by performing a partial QKD process together with the message-receiving node, and verifying a first message with the shared first and second secret keys and with the first and second trusted-node signatures.

Quantum key distribution-based quantum digital signature method and system including trusted node

The present disclosure relates to an eavesdropper detection apparatus and an operating method thereof, capable of effectively detecting an eavesdropper existing between a transmitter and a receiver in bit transmission by a quantum key distribution scheme.

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Daejeon, South Korea

Il Kwon Sohn