Counterfactual quantum cryptography network with untrusted relay

  title={Counterfactual quantum cryptography network with untrusted relay},
  author={Yuanyuan Chen and Xuemei Gu and Dong Jiang and Ling Xie and Lijun Chen},
Counterfactual quantum cryptography allows two remote parties to share a secret key even though a physical particle is not in fact transmitted through the quantum channel. In order to extend the scope of counterfactual quantum cryptography, we use an untrusted relay to construct a multi-user network. The implementation issues are discussed to show that the scheme can be realized with current technologies. We also prove the practical security advantages of the scheme by eliminating the… CONTINUE READING