Nonlinearity Attack Against the Kirchhoff-Law-Johnson-Noise (KLJN) Secure Key Exchange Protocol Academic Article

abstract

• This paper introduces a new attack against the KirchhoffLawJohnson-Noise (KLJN) secure key exchange scheme. The attack is based on the nonlinearity of the noise generators. We explore the effect of total distortion ([Formula: see text]) at the second order ([Formula: see text]), third order ([Formula: see text]) and a combination of the second and third orders ([Formula: see text]) on the security of the KLJN scheme. It is demonstrated that as little as 1% results in a notable power flow along the information channel, which leads to a significant information leak. We also show that decreasing the effective temperature (that is, the wire voltage) and, in this way reducing nonlinearity, results in the KLJN scheme approaching perfect security.

authors

• Kish, Laszlo

published proceedings

• FLUCTUATION AND NOISE LETTERS

author list (cited authors)

• Chamon, C., & Kish, L. B.

citation count

• 0

complete list of authors

• Chamon, Christiana||Kish, Laszlo B

publication date

• April 2022

publisher

• World Scientific Publishing  Publisher

published in

• Fluctuation and Noise Letters (FNL)  Journal

keywords

• Information Leak
• Nonlinearity
• Secure Key Exchange
• Unconditional Security

Digital Object Identifier (DOI)

• 10.1142/S0219477522500201

start page

• 2250020

volume

• 21

issue

• 02

URL

• http://dx.doi.org/10.1142/s0219477522500201