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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

It has been shown recently that the use of two pairs of resistors with enhanced Johnson-noise and a Kirchhoff-loop-i.e., a Kirchhoff-Law-Johnson-Noise (KLJN) protocol-for secure key distribution leads to information theoretic security…

Emerging Technologies · Computer Science 2016-11-17 R. Mingesz , L. B. Kish , Z. Gingl , C. G. Granqvist , H. Wen , F. Peper , T. Eubank , G. Schmera

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

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

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

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

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

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 letter proposes a novel hybrid key distribution architecture that jointly exploits quantum key distribution (QKD) and Kirchhoff-law-Johnson-noise (KLJN) statistical-physical key exchange. In the proposed system, an optical BB84-type…

Quantum Physics · Physics 2026-05-18 Ertugrul Basar

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

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

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

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

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

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

This is the longer (partially unpublished) version of response; the shorter version (http://arxiv.org/abs/physics/0605013) is published in Physics Letters A. We point out that the claims in the comment-paper of Scheuer and Yariv are either…

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

Quantum key distribution (QKD) permits information-theoretically secure transmission of digital encryption keys, assuming that the behaviour of the devices employed for the key exchange can be reliably modelled and predicted. Remarkably, no…

The statistical-physics-based Kirchhoff-law-Johnson-noise (KLJN) key exchange offers a new and simple unclonable system for credit/debit card chip authentication and payment. The key exchange, the authentication and the communication are…

Emerging Technologies · Computer Science 2016-07-21 Laszlo Bela Kish , Kamran Entesari , Claes-Goran Granqvist , Chiman Kwan

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

The laws of quantum mechanics allow unconditionally secure key distribution protocols. Nevertheless, security proofs of traditional quantum key distribution (QKD) protocols rely on a crucial assumption, the trustworthiness of the quantum…

Quantum Physics · Physics 2014-10-08 Umesh Vazirani , Thomas Vidick
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