What kind of noise guarantees security for the Kirchhoff-Loop-Johnson-Noise key exchange?

2014/05/06 by Robert Mingesz, Gergely Vadai, Zoltan Gingl
Computer Science · #cs.CR

paper · pdf · doi:10.1142/s0219477514500217

published as Fluctuation and Noise Letters 13:(3) E1450021 (2014)

arxiv created 2014/05/06 · arxiv updated 2014/09/30

Abstract

This article is a supplement to our recent one about the analysis of the noise properties in the Kirchhoff-Law-Johnson-Noise (KLJN) secure key exchange system [Gingl and Mingesz, PLOS ONE 9 (2014) e96109, doi:10.1371/journal.pone.0096109]. Here we use purely mathematical statistical derivations to prove that only normal distribution with special scaling can guarantee security. Our results are in agreement with earlier physical assumptions [Kish, Phys. Lett. A 352 (2006) 178-182, doi: 10.1016/j.physleta.2005.11.062]. Furthermore, we have carried out numerical simulations to show that the communication is clearly unsecure for improper selection of the noise properties. Protection against attacks using time and correlation analysis is not considered in this paper.

Citations

• Noise properties in the ideal Kirchhoff-Law-Johnson-Noise secure communication system
• Totally secure classical communication utilizing Johnson (-like) noise and Kirchoff's law