Double C-NOT attack on a single-state semi-quantum key distribution protocol and its improvement

• URL: http://arxiv.org/abs/2009.12535v1
• Date: Sat, 26 Sep 2020 08:29:26 GMT
• Title: Double C-NOT attack on a single-state semi-quantum key distribution protocol and its improvement
• Authors: Jun Gu, Tzonelih Hwang
• Abstract summary: An eavesdropper can use a double C-NOT attack to obtain parts of the final shared key without being detected by the participants. This study shows that an eavesdropper can use a double C-NOT attack to obtain parts of the final shared key without being detected by the participants.
• Score: 0.20767168898581634
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recently, Zhang et al. proposed a single-state semi-quantum key distribution protocol (Int. J. Quantum Inf, 18, 4, 2020) to help a quantum participant to share a secret key with a classical participant. However, this study shows that an eavesdropper can use a double C-NOT attack to obtain parts of the final shared key without being detected by the participants. To avoid this problem, a modification is proposed here.

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