摘要
We present an improved eavesdropping scheme on the quantum dialogue protocol in lossy channel, which is based on the strategies of Wojcik [Phys. Rev. Lett. 90 157901 （2003）] and ZML [Phys. Lett. A 333 46 （2004）] attack schemes. We show that our attack scheme doubles the domain of Eve＇s eavesdropping and Eve can gain more information of the communication with less risk of being detected. Finally, a possible improvement for the dialogue protocol security is proposed.
We present an improved eavesdropping scheme on the quantum dialogue protocol in lossy channel, which is based on the strategies of Wojcik [Phys. Rev. Lett. 90 157901 （2003）] and ZML [Phys. Lett. A 333 46 （2004）] attack schemes. We show that our attack scheme doubles the domain of Eve＇s eavesdropping and Eve can gain more information of the communication with less risk of being detected. Finally, a possible improvement for the dialogue protocol security is proposed.
基金
Project supported by the Natural Science Foundation of the Anhui Higher Education Institutions of China (Grant No.KJ2011Z359)
