Comment on 'Semi-Quantum Private Comparison Based on Bell States'
You-Lin Chen, Yu‐Chin Lu, Zhong-Xuan Lin, Tzonelih Hwang · arXiv (Cornell University) · 2020
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.