Secure quantum report with authentication based on GHz states and entan-glement swapping

A secure quantum report with authentication based on GHz states and entanglement swapping is proposed. The protocol lets authorized parties Bob and Charlie use N groups three particle GHz states to send their secret reports to their boss (Alice). Here, entanglement swapping of GHz states and Bell state measurement is employed by the communicators. It will be shown that using this method guarantees the honesty of the protocol, and scheme is secure not only against the intercept-and-resend attack but also against disturbance attack.