Unconditionally secure quantum key-distribution with relatively strong signal pulse

Abstract

We propose an unconditionally secure quantum key distribution (QKD) protocol, which uses a relatively strong signal pulse. While our protocol shares similar security bases as the Bennett 1992 protocol with a strong reference pulse (B92), our scheme uses a smaller number of detectors and it is robust against Rayleigh scattering in an optical fibre. We derive a lower bound of secret key generation rate of our protocol and show that our protocol can cover relatively long distances, assuming precise phase modulations and stable interferometers.

4 pages

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Cited by in corpus (7)

• Advances in Quantum Cryptography
• Practical issues in quantum-key-distribution post-processing
• Discrete-phase-randomized coherent state source and its application in quantum key distribution
• Robust Unconditionally Secure Quantum Key Distribution with Two Nonorthogonal and Uninformative States
• Boosting quantum key distribution via the end-to-end loss control
• Security proof of differential phase shift quantum key distribution in the noiseless case
• Compensating the Noise of a Communication Channel via Asymmetric Encoding of Quantum Information