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Analysis of an Attenuator Artifact in an Experimental Attack by Gunn–Allison–Abbott Against the Kirchhoff-Law–Johnson-Noise (KLJN) Secure Key Exchange System
Abstract
A recent paper by Gunn–Allison–Abbott (GAA) [L. J. Gunn et al., Scientific Reports 4 (2014) 6461] argued that the Kirchhoff-law–Johnson-noise (KLJN) secure key exchange system could experience a severe information leak. Here we refute their results and demonstrate that GAA’s arguments ensue from a serious design flaw in their system. Specifically, an attenuator broke the single Kirchhoff-loop into two coupled loops, which is an incorrect operation since the single loop is essential for the security in the KLJN system, and hence GAA’s asserted information leak is trivial. Another consequence is that a fully defended KLJN system would not be able to function due to its builtin current-comparison defense against active (invasive) attacks. In this paper we crack GAA’s scheme via an elementary current-comparison attack which yields negligible error probability for Eve even without averaging over the correlation time of the noise.
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Authors (4)
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Laszlo B. Kish
- Te x as A & M U n i v e r si t y D e part me nt of Elec t ri cal Eng i nee ri ng
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Zoltan Gingl
- U n i v e r si t y of S zeg ed D e par t m e n t of Tec hn i cal In f orm at i c s
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Robert Mingesz
- U n i v e r si t y of S zeg ed D e par t m e n t of Tec hn i cal In f orm at i c s
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1142/S021947751550011X
- License
- Copyright (2014 World Scientific Publishing Company)
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
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FLUCTUATION AND NOISE LETTERS
no. 14,
edition 01,
ISSN: 0219-4775 - Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Kish L., Gingl Z., Mingesz R., Smulko J.: Analysis of an Attenuator Artifact in an Experimental Attack by Gunn–Allison–Abbott Against the Kirchhoff-Law–Johnson-Noise (KLJN) Secure Key Exchange System// FLUCTUATION AND NOISE LETTERS. -Vol. 14, iss. 01 (2015),
- DOI:
- Digital Object Identifier (open in new tab) 10.1142/s021947751550011x
- Verified by:
- Gdańsk University of Technology
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