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Keywords = quantum three-pass protocol

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9 pages, 734 KB  
Article
Cryptanalysis of a Semi-Quantum Bi-Signature Scheme Based on W States
by Chun-Wei Yang, Jason Lin, Chia-Wei Tsai and Ching-Lin Cheng
Entropy 2022, 24(10), 1408; https://doi.org/10.3390/e24101408 - 1 Oct 2022
Cited by 10 | Viewed by 2433
Abstract
Recently, Zhao et al. proposed a semi-quantum bi-signature (SQBS) scheme based on W states with two quantum signers and just one classical verifier. In this study, we highlight three security issues with Zhao et al.’s SQBS scheme. In Zhao et al.’s SQBS protocol, [...] Read more.
Recently, Zhao et al. proposed a semi-quantum bi-signature (SQBS) scheme based on W states with two quantum signers and just one classical verifier. In this study, we highlight three security issues with Zhao et al.’s SQBS scheme. In Zhao et al.’s SQBS protocol, an insider attacker can perform an impersonation attack in the verification phase and an impersonation attack in the signature phase to capture the private key. In addition, an eavesdropper can perform a man-in-the-middle attack to obtain all of the signer’s secret information. All of the above three attacks can pass the eavesdropping check. Without considering these security issues, the SQBS protocol could fail to ensure the signer’s secret information. Full article
(This article belongs to the Special Issue Quantum Control and Quantum Computing)
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14 pages, 2231 KB  
Article
Experimental Quantum Message Authentication with Single Qubit Unitary Operation
by Min-Sung Kang, Yong-Su Kim, Ji-Woong Choi, Hyung-Jin Yang and Sang-Wook Han
Appl. Sci. 2021, 11(6), 2653; https://doi.org/10.3390/app11062653 - 16 Mar 2021
Cited by 9 | Viewed by 3415
Abstract
We have developed a quantum message authentication protocol that provides authentication and integrity of an original message using single qubit unitary operations. Our protocol mainly consists of two parts: quantum encryption and a correspondence check. The quantum encryption part is implemented using linear [...] Read more.
We have developed a quantum message authentication protocol that provides authentication and integrity of an original message using single qubit unitary operations. Our protocol mainly consists of two parts: quantum encryption and a correspondence check. The quantum encryption part is implemented using linear combinations of wave plates, and the correspondence check is performed using Hong–Ou–Mandel interference. By analyzing the coincidence counts of the Hong–Ou–Mandel interference, we have successfully proven the proposed protocol experimentally, and also showed its robustness against an existential forgery. Full article
(This article belongs to the Special Issue Basics and Applications in Quantum Optics)
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