Quantum Secure Communication Scheme with <i>W</i> State
Quantum Secure Communication Scheme with <i>W</i> State
Recently, Cao et al. proposed a new quantum secure direct communication scheme using W state. In their scheme, the error rate introduced by an eavesdropper who takes intercept-resend attack, is only 8.3%. Actually, their scheme is just a quantum key distribution scheme because the communication parties first create a shared …