Quantum Key Distribution Network Based on Differential PhaseShift

Abstract

Using a series of quantum correlated photon pairs, we propose atheoretical scheme for any-to-any multi-user quantum keydistribution network based on differential phase shift. Thedifferential phase shift and the different detection time slotsensure the security of our scheme against eavesdropping. We discussthe security under the intercept–resend attack and the sourcereplacement attack.