  We propose in this paper a novel deterministic protocol using particular
maximally entangled states of polarized photons for a genuine bidirectional
secure communication setup. We further propose a plausible experimental setup
for such a protocol using currently available optical technology which
liberates two communicating party from sharing identical apparatus. We note
that security of the protocol is promised by the monogamous nature of maximally
entangled states. We discuss the security of our protocol in the light of some
simple eavesdropping scenarios.
