报告题目：Would One Enjoy Quantum Secure Group Communication?
报 告 人：Prof. Mohammad Al-Amri (The National Center for Applied Physics, KACST, P.O. Box 6086, Riyadh 11442, Saudi Arabia)
报告时间：2018年4月20日 （周五） 15：30
报告地点：校本部G309
邀请人：李征鸿 杨希华
报告摘要：
In this talk, we will present our proposed secure quantum communication protocol that allows secure messages to be shared among multiple authorized users. Our protocol is based on Ping-Pong protocol, and the utility of our SLAZ protocol which indicates that current security strategy is no longer safe. Furthermore, we will show that the phase operation acted on the photon can be found out by the "invisible" photon. This clearly can be used as hacking mechanism, and we call it counterfactual attack. Thus, it is important to defeat this attack, we propose a multi-users authorization system that work based on sharing a secure message/key among multi-users resulting in a quantum secure group communication protocol.
