Noise in the wire: the real impact of wire resistance for the Johnson (-like) noise based secure communicator

Abstract

We re-evaluate the impact of wire resistance on the noise voltage and current in the Johnson-(like)-noise based secure communicator, correcting the result presented in [Physics Letters A 359 (2006) 737]. The analysis shown here is based on the fluctuation-dissipation and the linear response theorems. The results indicate that the impact of wire resistance in practical communicators is significantly lower than the previous estimation.

Accepted for publication in Physics Letters A, on March 10, 2010

References in corpus (3)

• Controlling passively-quenched single photon detectors by bright light
• A classical key distribution system based on Johnson (like) noise - How secure?
• Response to Scheuer-Yariv: "A Classical Key-Distribution System based on Johnson (like) noise -How Secure?"

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• Resource requirements and speed versus geometry of unconditionally secure physical key exchanges
• Comments on the "Generalized" KLJN Key Exchanger with Arbitrary Resistors: Power, Impedance, Security
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• AC Loop Current Attacks Against The KLJN Secure Key Exchange Scheme
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• Perspective -- On the thermodynamics of perfect unconditional security
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• Nonlinearity Attack against the Kirchhoff-Law-Johnson-Noise (KLJN) Secure Key Exchange Protocol
• Facts, myths and fights about the KLJN classical physical key exchanger