An Improved Protocol for Controlled Deterministic Secure Quantum Communication Using Five-Qubit Entangled State

作者：Kao Shih Hung; Lin Jason; Tsai Chia Wei; Hwang Tzonelih^*

来源：International Journal of Theoretical Physics, 2018, 57(6): 1894-1902.

DOI：10.1007/s10773-018-3715-5

• Quantum cryptography
• Quantum entanglement
• Deterministic secure quantum communication
• Information leakage

In early 2009, Xiu et al. (Opt. Commun. 282(2) 333-337 2009) presented a controlled deterministic secure quantum communication (CDSQC) protocol via a newly constructed five-qubit entangled quantum state. Later, Qin et al. (Opt. Commun. 282(13), 2656-2658 2009) pointed out two security loopholes in Xiu et al.'s protocol: (1) A correlation-elicitation (CE) attack can reveal the entire secret message; (2) A leakage of partial information for the receiver is noticed. Then, Xiu et al. (Opt. Commun. 283(2), 344-347 2010) presented a revised CDSQC protocol to remedy the CE attack problem. However, the information leakage problem still remains open. This work proposes a new CDSQC protocol using the same five-qubit entangled state which can work without the above mentioned security problems. Moreover, the Trojan Horse attacks can be automatically avoided without using detecting devices in the new CDSQC.

• 出版日期2018-6