Examining the correctness of anonymity for practical quantum networks
Yu‐Guang Yang, Yongli Yang, Xin-Long Lv, Yi‐Hua Zhou, Wei‐Min Shi · Physical Review A · 2020
In a recent paper [A. Unnikrishnan et al., Phys. Rev. Lett. 122, 240501 (2019)], a quantum anonymous communication protocol was proposed in the presence of malicious agents and an untrusted source. Here, we point out that malicious agents can change the generated anonymous entanglement between the sender and the receiver without being detected, which means that the correctness of the generated anonymous entanglement should be reexamined. The way to check the above correctness is discussed.