Security of quantum cryptography using balanced homodyne detection

Details Security of quantum cryptography using balanced homodyne detection Security of quantum cryptography using balanced homodyne detection

2002-05-31

arxiv.org/abs/quant-ph/0205191v2

Phys. Rev. A 67, 022308 (2003) (7 pages)

Physics

Quantum Physics

RevTeX4, 8pages, 7 figures

Scientific paper

10.1103/PhysRevA.67.022308

In this paper we investigate the security of a quantum cryptographic scheme which utilizes balanced homodyne detection and weak coherent pulse (WCP). The performance of the system is mainly characterized by the intensity of the WCP and postselected threshold. Two of the simplest intercept/resend eavesdropping attacks are analyzed. The secure key gain for a given loss is also discussed in terms of the pulse intensity and threshold.

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