Comment on 'Semi-Quantum Private Comparison Based on Bell States'

22 Dec 2020 · You-Lin Chen, Yu-Chin Lu, Zhong-Xuan Lin, Tzonelih Hwang ·

This study points out a semi-quantum protocol for private comparison using Bell states (SQPC) suffering from the double C-NOT attack and the malicious agent attack. The attacker can easily obtain information through these attacks. An improved protocol is proposed, which can effectively resist both of these attacks.