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arXiv:quant-ph/0702084

Secure Quantum Telephones

Jesni Shamsul Shaari, Ressa S. Said, Mohamed Ridza Wahiddin

Published Feb 9, 2007• 0 citations
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Abstract

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.

DOI
10.48550/arxiv.quant-ph/0702084

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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.
A new probabilistic bidirectional quantum secure communication protocol based on a shared partially entangled states is proposed. In this scheme the decoy-photon technique is exploited to ensure the security of the transmission of qubits. The highlight of our protocol is that in addition to elimination of the drawback "information leakage", In our protocol it is not necessary to the parties of communication to have an ideal maximally entangled pairs, which makes this scheme more convenient than previews protocols in a practical application.
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Quantum communication is an important branch of quantum technology. It can safely transmit private information between legitimate parties and its unconditional security is guaranteed by quantum physics. So far, deterministic secure quantum communication without entanglement usually transmits single photons in two-way quantum channels. We propose a deterministic secure quantum communication proposal, and it requires a one-way quantum channel and a classical channel. In our protocol, a sender encodes logical bits by using two conjugate bases consisting of the polarization and time-bin degrees of freedom of a photon and transmits it to a receiver over a quantum channel. Upon receiving this photon, the receiver measures it randomly in two bases and can decode the bit deterministically with the help of the sender. Any attack from eavesdroppers will be detected by the legitimate parties. Furthermore, this protocol can be implemented with linear-optic elements and single-photon detectors.