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arXiv · 2308.08821

Experimental quantum e-commerce

Xiao-Yu Cao·Bing-Hong Li·Yang Wang·Yao Fu·Hua-Lei Yin·Zeng-Bing Chen
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Abstract

E-commerce, a type of trading that occurs at a high frequency on the Internet, requires guaranteeing the integrity, authentication and non-repudiation of messages through long distance. As current e-commerce schemes are vulnerable to computational attacks, quantum cryptography, ensuring information-theoretic security against adversary's repudiation and forgery, provides a solution to this problem. However, quantum solutions generally have much lower performance compared to classical ones. Besides, when considering imperfect devices, the performance of quantum schemes exhibits a significant decline. Here, for the first time, we demonstrate the whole e-commerce process of involving the signing of a contract and payment among three parties by proposing a quantum e-commerce scheme, which shows resistance of attacks from imperfect devices. Results show that with a maximum attenuation of 25 dB among participants, our scheme can achieve a signature rate of 0.82 times per second for an agreement size of approximately 0.428 megabit. This proposed scheme presents a promising solution for providing information-theoretic security for e-commerce.

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Xiao-Yu Cao, Bing-Hong Li, Yang Wang, Yao Fu, Hua-Lei Yin, Zeng-Bing Chen. 2024-01-14. Experimental quantum e-commerce. https://doi.org/10.1126/sciadv.adk3258

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