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On the security of the Kirchhoff-law-Johnson-noise (KLJN) communicator
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2014 (English)In: Quantum Information Processing, ISSN 1570-0755, E-ISSN 1573-1332, Vol. 13, no 10, 2213-2219 p.Article in journal (Refereed) Published
Abstract [en]

A simple and general proof is given for the information theoretic (unconditional) security of the Kirchhoff-law-Johnson-noise key exchange system under practical conditions. The unconditional security for ideal circumstances, which is based on the second law of thermodynamics, is found to prevail even under slightly non-ideal conditions. This security level is guaranteed by the continuity of functions describing classical physical linear, as well as stable non-linear, systems. Even without privacy amplification, Eve's probability for successful bit guessing is found to converge toward 0.5-i.e., the perfect security level-when ideal conditions are approached.

Place, publisher, year, edition, pages
2014. Vol. 13, no 10, 2213-2219 p.
Keyword [en]
Classical physical secure key exchange, Johnson noise
National Category
Physical Sciences Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
URN: urn:nbn:se:uu:diva-234145DOI: 10.1007/s11128-014-0729-7ISI: 000341842000005OAI: oai:DiVA.org:uu-234145DiVA: diva2:755972
Available from: 2014-10-15 Created: 2014-10-14 Last updated: 2014-10-17Bibliographically approved

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Granqvist, Claes-Göran
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