Single-Shot Secure Quantum Network Coding for General Multiple Unicast Network With Free One-Way Public Communication

It is natural in a quantum network system that multiple users intend to send their message respective receivers, which called unicast network. We propose canonical method derive secure code over from classical code. Our correctly transmits states when there no attack. also guarantees the secrecy of transmitted state even with existence an attack satisfies certain condition. In our security proof, eavesdropper allowed modify wiretapped information dependently on previously messages. protocol by utilizing one-way transmission (public communication) same direction as although verification requires two-way communication. protocol, some nodes may share secret randomness resources advance. can be applied several networks including butterfly