A Two Way Synchronized Quantum Channel Quantum Key Distribution Protocol

Background: The basic Protocols of Quantum Key Distribution (QKD) and their variations use a one way quantum channel for the transmission of quantum information and later use a classical channel for reconciliation phase. Objective: In this paper we are discussing a QKD protocol which is a variation over two basic protocols i.e. BB84 and B92 and uses two-way quantum channel instead of one way quantum channel and it also uses classical channel for reconciliation phase. Method: This protocol is synchronized in a manner that both parties who want to share key start communication at same point of time. Results: We have also given the design for proposed protocols and their comparison with basic protocols. Conclusion: Finally we analyzed the results and found the proposed protocols better with high capacity and low error estimation.