MEASUREMENT-DEVICE-INDEPENDENT QUANTUM IDENTITY AUTHENTICATION WITHOUT JOINT MEASUREMENT

Measurement-device-independent quantum identity authentication (MDI-QIA) provides a method for the channel attacks of the detector side. In all existing MDI-QIA protocols, Alice and Bob need to simultaneously prepare single photon quantum states based on the identity key and send them to Charlie, who needs to perform experimentally difficult joint measurements. This paper proposes an improved MDI-QIA protocol, which only requires Alice or Bob to prepare quantum states and does not rely on Charlie’s joint measurement. On the one hand, the improved MDI-QIA protocol saves quantum resources, on the other hand, the process of authentication is more simplified, and the experimental difficulty is significantly reduced. The security and theoretical feasibility of the protocol are verified based on IBM quantum composer.