论文标题
基于钟状态的半Quantum私人比较方案的隐式分析和改进
Cryptanalysis and improvement of a semi-quantum private comparison protocol based on Bell states
论文作者
论文摘要
半Quantum私人比较（SQPC）允许两名具有有限量子能力的参与者，可以在半决赛第三方（TP）的帮助下安全地比较其秘密的平等。最近，江提出了基于铃铛状态的SQPC协议（量子INF进程19（6）：180，2020），并声称它是安全的。在本文中，我们介绍了对江式SQPC协议的两种攻击类型。在第一种攻击中，外部窃听器将使参与者接受错误的结果。在第二种攻击中，恶意参与者不仅会使其他参与者接受错误的结果，而且还会学习诚实参与者的秘密。两种类型的攻击都将被检测到。此外，我们提出了一种改进的SQPC协议，可以抵抗这两种攻击。
Semi-quantum private comparison (SQPC) allows two participants with limited quantum ability to securely compare the equality of their secrets with the help of a semi-dishonest third party (TP). Recently, Jiang proposed a SQPC protocol based on Bell states (Quantum Inf Process 19(6): 180, 2020) and claimed it is secure. In this paper, we present two types of attack on Jiang's SQPC protocol. In the first type of attack, an outside eavesdropper will make participants accept a wrong result. In the second type of attack, a malicious participant will not only make the other participant accept a wrong result, but also learn the secret of the honest participant. Neither type of attack will be detected. In addition, we propose an improved SQPC protocol that can resist these two types of attack.
