Next Article in Journal
A Feature Selection Method for Multi-Label Text Based on Feature Importance
Previous Article in Journal
Mutated Channelrhodopsins with Increased Sodium and Calcium Permeability
Open AccessFeature PaperArticle

A Static-loop-current Attack Against the Kirchhoff-Law-Johnson-Noise (KLJN) Secure Key Exchange System

Department of Electrical and Computer Engineering, Texas A & M University, 3128 TAMU, College Station, TX 77843, USA
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(4), 666; https://doi.org/10.3390/app9040666
Received: 10 October 2018 / Revised: 5 December 2018 / Accepted: 12 February 2019 / Published: 15 February 2019
In this study, a new attack against the Kirchhoff-Law-Johnson-Noise (KLJN) key distribution system is explored. The attack is based on utilizing a parasitic voltage-source in the loop. Relevant situations often exist in the low-frequency limit in practical systems, especially when the communication is over a distance, or between different units within an instrument, due to a ground loop and/or electromagnetic interference (EMI). Our present study investigates the DC ground loop situation when no AC or EMI effects are present. Surprisingly, the usual current/voltage comparison-based defense method that exposes active attacks or parasitic features (such as wire resistance allowing information leaks) does not function here. The attack is successfully demonstrated and proposed defense methods against the attack are shown. View Full-Text
Keywords: KLJN key exchange; unconditional security; ground loop vulnerability; passive attack KLJN key exchange; unconditional security; ground loop vulnerability; passive attack
Show Figures

Figure 1

MDPI and ACS Style

Melhem, M.Y.; Kish, L.B. A Static-loop-current Attack Against the Kirchhoff-Law-Johnson-Noise (KLJN) Secure Key Exchange System. Appl. Sci. 2019, 9, 666.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop