https://doi.org/10.1140/epjqt/s40507-024-00275-5
Research
Multi-party quantum key distribution protocol in quantum network
Department of Computer Science and Information Engineering, National Taichung University of Science and Technology, No.129, Sec. 3, Sanmin Rd., North Dist., 404, Taichung City, Taiwan
Received:
4
August
2024
Accepted:
18
September
2024
Published online:
27
September
2024
This study proposes a measurement property of graph states and applies it to design a mediated multiparty quantum key distribution (M-MQKD) protocol for a repeater-based quantum network in a restricted quantum environment. The protocol enables remote classical users, who cannot directly transmit qubits, to securely distribute a secret key with the assistance of potentially dishonest quantum repeaters. Classical users only require two quantum capabilities, while quantum repeaters handle entanglement transmission through single-photon measurements. The one-way transmission approach eliminates the need for additional defenses against quantum Trojan horse attacks, reducing maintenance costs compared to round-trip or circular transmission methods. As a result, the M-MQKD protocol is lightweight and easy to implement. The study also evaluates the security of the protocol and demonstrates its practicality through quantum network simulations.
Key words: Multiparty semi-quantum key distribution / Mediated multiparty quantum key distribution / Quantum network / Quantum repeater / Quantum Trojan horse attack
© The Author(s) 2024
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