Abstract
We classify and analyze bit errors in the voltage and current measurement modes of the Kirchhoff-law–Johnson-noise (KLJN) secure key distribution system. In both measurement modes, the error probability decays exponentially with increasing duration of the bit sharing period (BSP) at fixed bandwidth. We also present an error mitigation strategy based on the combination of voltage-based and current-based schemes. The combination method has superior fidelity, with drastically reduced error probability compared to the former schemes, and it also shows an exponential dependence on the duration of the BSP.
Highlights
IntroductionThis paper classifies and analyzes different types of errors, due to statistical inaccuracies in noise measurements, within the Kirchhoff-law–Johnson-noise (KLJN) system[1,2] and demonstrates a new and efficient way of removing these errors.[3,4] It is a summary of recent findings presented in Refs. 3 and 4
This paper classifies and analyzes different types of errors, due to statistical inaccuracies in noise measurements, within the Kirchhoff-law–Johnson-noise (KLJN) system[1,2] and demonstrates a new and efficient way of removing these errors.[3,4] It is a summary of recent findings presented in Refs. 3 and 4.We first present a brief description of the working principle of the KLJN system.[1,2,3,4]This is an Open Access article published by World Scientific Publishing Company
We present an error mitigation strategy based on the combination of voltagebased and current-based schemes
Summary
This paper classifies and analyzes different types of errors, due to statistical inaccuracies in noise measurements, within the Kirchhoff-law–Johnson-noise (KLJN) system[1,2] and demonstrates a new and efficient way of removing these errors.[3,4] It is a summary of recent findings presented in Refs. 3 and 4. 1.1 The Kirchhoff-law–Johnson-noise secure key distribution The KLJN secure key exchange has been proven to give information-theoretic security.[5,6] This key distribution scheme is based on Kirchhoff’s loop law of quasi-static electrodynamics and the fluctuation-dissipation theorem of statistical physics.[1,2,3,4,5,6,7,8,9] Figure 1 shows the ideal KLJN scheme.[1,2,3,4] The core channel is a wire line to which the two communicating parties, denoted “Alice” and “Bob”, connect their resistors RA and RB , respectively These resistors are randomly chosen from the set {R0, R1} , with R0 ≠ R1 , where R0 and R1 represent the different bit values.
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