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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

The security of the Kirchhoff-law-Johnson-(like)-noise (KLJN) key exchange system is based on the Fluctuation-Dissipation-Theorem of classical statistical physics. Similarly to quantum key distribution, in practical situations, due to the…

Emerging Technologies · Computer Science 2015-11-23 Hsien-Pu Chen , Elias Gonzalez , Yessica Saez , Laszlo B. Kish

The information theoretically secure Kirchhoff-law-Johnson-noise (KLJN) key exchange scheme, similarly to quantum key distribution (QKD), is also potentially vulnerable against clock attacks, where Eve takes over the control of clock…

Cryptography and Security · Computer Science 2022-07-15 Laszlo B. Kish

In [3], the authors proposed a highly efficient secure and privacy-preserving scheme for secure vehicular communications. The proposed scheme consists of four protocols: system setup, protocol for STP and STK distribution, protocol for…

Cryptography and Security · Computer Science 2015-08-10 Lei Zhang , Chuanyan Hu , Qianhong Wu , Josep Domingo-Ferrer , Bo Qin

A new attack against the Kirchhoff-Law-Johnson-Noise (KLJN) key distribution system is explored. The attack is based on utilizing a parasitic dc-voltage-source in the loop. Relevant situations often exist in the low-frequency limit in…

Cryptography and Security · Computer Science 2018-10-04 Mutaz Y. Melhem , Laszlo 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

In this paper, a Resistor Hopping (RH) scheme with the addition of biases is proposed for secure Kirchhoff Law Johnson-Noise (KLJN) communication. The RH approach enables us to increase the bit rate of secure communication between Alice and…

Signal Processing · Electrical Eng. & Systems 2025-09-16 Hadi Zayyani , Felipe A. P. de Figueiredo , Mohammad Salman , Rausley A. A. de Souza

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

This study investigates a duality approach to information leak detection in the generalized Kirchhoff-Law-Johnson-Noise secure key exchange scheme proposed by Vadai, Mingesz, and Gingl (VMG-KLJN). While previous work by Chamon and Kish…

Cryptography and Security · Computer Science 2025-06-03 Sarah Flanery , Anson Trapani , Christiana Chamon , Leyla Nazhandali

Vehicular communication networks is a promising and emerging technology to facilitat road safety, Safety of life, traffic management, and infotainment dissemination for drivers and passengers. One of the ultimate goals in the design of such…

Cryptography and Security · Computer Science 2012-07-05 Ghassan Samara

We outline some general solutions to use already existing and currently used wire lines, such as power lines, phone lines, internet lines, etc, for the unconditionally secure communication method based on Kirchoff's Law and Johnson-like…

General Physics · Physics 2007-05-23 Laszlo B. Kish

In this paper, the vulnerability of the Vadai, Mingesz and Gingl (VMG)- Kirchhoff-Law-Johnson-Noise (KLJN) Key Exchanger (Nature, Science Report 5 (2015) 13653) against two active attacks is demonstrated. The security vulnerability arises…

Cryptography and Security · Computer Science 2022-11-15 Shahriar Ferdous , Christiana Chamon , Laszlo B. Kish

Secure message dissemination is an important issue in vehicular networks, especially considering the vulnerability of vehicle to vehicle message dissemination to malicious attacks. Traditional security mechanisms, largely based on message…

Information Theory · Computer Science 2018-03-26 Jieqiong Chen , Guoqiang Mao , Changle Li , Degan Zhang

The imperative need for unconditional secure key exchange is expounded by the increasing connectivity of networks and by the increasing number and level of sophistication of cyberattacks. Two concepts that are information theoretically…

Cryptography and Security · Computer Science 2015-04-27 Elias Gonzalez , Robert S. Balog , Laszlo B. Kish

We classify and analyze bit errors in the current measurement mode of the Kirchhoff-law-Johnson-noise (KLJN) key distribution. The error probability decays exponentially with increasing bit exchange period and fixed bandwidth, which is…

Cryptography and Security · Computer Science 2014-02-14 Yessica Saez , Laszlo B. Kish , Robert Mingesz , Zoltan Gingl , Claes G. Granqvist

A new attack against the Kirchhoff-Law-Johnson-Noise(KLJN) secure key exchange scheme is introduced. The attack exploits a parasitic (periodic) AC voltage-source at either Alice or Bob ends. Such situations exist due to AC ground loops and…

Cryptography and Security · Computer Science 2021-07-20 Mutaz Melhem , Christiana Chamon , Shahriar Ferdous , Laszlo B. Kish

First, we show a new inexpensive defense against intruders and the man-in-the-middle attack in the Kirchhoff's-loop-Johnson-like-noise (KLJN) cipher. Then instead of point-to-point communication, we propose a high efficiency, secure…

General Physics · Physics 2007-05-23 Laszlo B. Kish , Robert Mingesz

This paper introduces and demonstrates two new attacks against the Kirchhoff-Law-Johnson-Noise (KLJN) secure key exchange scheme. The attacks are based on random number generators with compromised security. First we explore the situation in…

Cryptography and Security · Computer Science 2020-05-22 Christiana Chamon , Shahriar Ferdous , Laszlo B. Kish

We point out that the claims in the comment-paper of Scheuer and Yariv are either irrelevant or incorrect. The idealized Kirchoff-loop-Johnson-like-noise (KLJN) scheme is totally secure therefore it is more secure than idealized quantum…

General Physics · Physics 2007-05-23 Laszlo B. Kish

Recently, Gunn, Allison and Abbott (GAA) [http://arxiv.org/pdf/1402.2709v2.pdf] proposed a new scheme to utilize electromagnetic waves for eavesdropping on the Kirchhoff-law-Johnson-noise (KLJN) secure key distribution. We proved in a…

Cryptography and Security · Computer Science 2014-08-26 Hsien-Pu Chen , Laszlo B. Kish , Claes-Goran Granqvist , Gabor Schmera