Phys. Rev. A 67, 022308 (2003) [7 pages]Security of quantum cryptography using balanced homodyne detectionReceived 31 May 2002; published 24 February 2003 In this paper we investigate the security of a quantum cryptographic scheme which utilizes balanced homodyne detection and weak coherent pulses (WCP). The performance of the system is mainly characterized by the intensity of the WCP and postselected threshold. Two of the simplest intercept and resend eavesdropping attacks are analyzed. The secure key gain for a given loss is also discussed in terms of the pulse intensity and threshold. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.67.022308
DOI:
10.1103/PhysRevA.67.022308
PACS:
03.67.Dd, 42.50.Lc
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