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The Kirchhoff-Law-Johnson-Noise (KLJN) secure key exchange system has been introduced as a simple, very low cost and efficient classical physical alternative to quantum key distribution systems. The ideal system uses only a few electronic…

Cryptography and Security · Computer Science 2015-09-23 Gergely Vadai , Robert Mingesz , Zoltan Gingl

The Kirchhoff-law-Johnson-noise (KLJN) scheme is a statistical/physical secure key exchange system based on the laws of classical statistical physics to provide unconditional security. We used the LTSPICE industrial cable and circuit…

Cryptography and Security · Computer Science 2016-06-03 Hsien-Pu Chen , Muneer Mohammad , Laszlo B. Kish

This paper deals with the Kirchhoff-law-Johnson-noise (KLJN) classical statistical physical key exchange method and surveys criticism - often stemming from a lack of understanding of its underlying premises or from other errors - and our…

Emerging Technologies · Computer Science 2015-03-30 Laszlo B. Kish , Derek Abbott , Claes-Goran Granqvist , He Wen

We introduce seven new versions of the Kirchhoff-Law-Johnson-(like)-Noise (KLJN) classical physical secure key exchange scheme and a new transient protocol for practically-perfect security. While these practical improvements offer…

Cryptography and Security · Computer Science 2013-06-18 Laszlo B. Kish

In this paper we determine the noise properties needed for unconditional security for the ideal Kirchhoff-Law-Johnson-Noise (KLJN) secure key distribution system using simple statistical analysis. It has already been shown using physical…

Cryptography and Security · Computer Science 2014-05-07 Zoltan Gingl , Robert Mingesz

A simple and general proof is given for the information theoretic (unconditional) security of the Kirchhoff-law-Johnson-noise (KLJN) key exchange system under practical conditions. The unconditional security for ideal circumstances, which…

Cryptography and Security · Computer Science 2014-12-30 L. B. Kish , C. G. Granqvist

Noise: an enemy to be dealt with and a major factor limiting communication system performance. However, what if there is gold in that garbage? In conventional engineering, our focus is primarily on eliminating, suppressing, combating, or…

Information Theory · Computer Science 2024-06-28 Ertugrul Basar

We introduce two new Kirchhoff-law-Johnson-noise (KLJN) secure key distribution schemes which are generalizations of the original KLJN scheme. The first of these, the Random-Resistor (RR-) KLJN scheme, uses random resistors with values…

Emerging Technologies · Computer Science 2016-03-04 Laszlo Bela Kish , Claes-Goran Granqvist

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].…

Cryptography and Security · Computer Science 2014-09-30 Robert Mingesz , Gergely Vadai , Zoltan Gingl

The information-theoretically (unconditionally) secure Kirchhoff-law-Johnson-noise (KLJN) bit exchange protocol uses two identical resistor pairs with high (H) and low (L) resistance values, driven by Gaussian noise generators emulating…

Signal Processing · Electrical Eng. & Systems 2025-04-16 Recep Akif Tasci , Ibrahim Yildirim , Ertugrul Basar

Weak physical uncloneable function (WPUF) encryption key means that the manufacturer of the hardware can clone the key but anybody else is unable to so that. Strong physical uncloneable function (SPUF) encryption key means that even the…

Cryptography and Security · Computer Science 2013-12-18 Laszlo B. Kish , Chiman Kwan

A secure key distribution (exchange) scheme is unconditionally secure if it is unbreakable against arbitrary technological improvements of computing power and/or any development of new algorithms. There are only two families of…

Quantum Physics · Physics 2021-07-20 Christiana Chamon , Laszlo Kish

This paper introduces a new attack against the Kirchhoff-Law-Johnson-Noise (KLJN) secure key exchange scheme. The attack is based on the nonlinearity of the noise generators. We explore the effect of total distortion (TD) at the second…

Cryptography and Security · Computer Science 2021-08-24 Christiana Chamon , Laszlo B. Kish

In (Nature) Science Report 5 (2015) 13653, Vadai, Mingesz and Gingl (VMG) introduce a new Kirchhoff-law-Johnson-noise (KLJN) secure key exchanger that operates with 4 arbitrary resistors (instead of 2 arbitrary resistance values forming 2…

Cryptography and Security · Computer Science 2020-12-07 Shahriar Ferdous , Christiana Chamon , Laszlo B. Kish

In the case of the need of extraordinary security, Kirchhoff-loop-Johnson-(like)-noise ciphers can easily be integrated on existing types of digital chips in order to provide secure data communication between hardware processors, memory…

General Physics · Physics 2011-08-16 Laszlo B. Kish , Olivier Saidi

In a former paper [Fluct. Noise Lett., 13 (2014) 1450020] we introduced a vehicular communication system with unconditionally secure key exchange based on the Kirchhoff-Law-Johnson-Noise (KLJN) key distribution scheme. In this paper, we…

Cryptography and Security · Computer Science 2015-01-09 X. Cao , Y. Saez , G. Pesti , L. B. Kish

We introduce the so far most efficient attack against the Kirchhoff-law-Johnson-noise (KLJN) secure key exchange system. This attack utilizes the lack of exact thermal equilibrium in practical applications and is based on cable resistance…

Emerging Technologies · Computer Science 2015-03-30 Laszlo B. Kish , Claes-Goran Granqvist

A method to quantify the error probability at the Kirchhoff-law-Johnson-noise (KLJN) secure key exchange is introduced. The types of errors due to statistical inaccuracies in noise voltage measurements are classified and the error…

Emerging Technologies · Computer Science 2013-12-18 Yessica Saez , Laszlo B. Kish

In this paper, we introduce the Kirchhoff-Law-Johnson-Noise (KLJN) as an approach to securing satellite communications. KLJN has the potential to revolutionize satellite communication security through its combination of simplicity,…

Cryptography and Security · Computer Science 2025-06-13 Lucas Truax , Sandip Roy , Laszlo B. Kish

Recently, Bennett and Riedel (BR) (http://arxiv.org/abs/1303.7435v1) argued that thermodynamics is not essential in the Kirchhoff-law-Johnson-noise (KLJN) classical physical cryptographic exchange method in an effort to disprove the…

Cryptography and Security · Computer Science 2013-12-18 Laszlo B. Kish , Derek Abbott , Claes-Goran Granqvist
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