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.