Thermal noise informatics: Totally secure communication via a wire; Zero-power communication; and Thermal noise driven computing

Laszlo B. Kish, Robert Mingesz, Zoltan Gingl

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Very recently, it has been shown that Gaussian thermal noise and its artificial versions (Johnson-like noises) can be utilized as an information carrier with peculiar properties therefore it may be proper to call this topic Thermal Noise Informatics. Zero Power (Stealth) Communication, Thermal Noise Driven Computing, and Totally Secure Classical Communication are relevant examples. In this paper, while we will briefly describe the first and the second subjects, we shall focus on the third subject, the secure classical communication via wire. This way of secure telecommunication utilizes the properties of Johnson(-like) noise and those of a simple Kirchhoff s loop. The communicator is unconditionally secure at the conceptual (circuit theoretical) level and this property is (so far) unique in communication systems based on classical physics. The communicator is superior to quantum alternatives in all known aspects, except the need of using a wire. In the idealized system, the eavesdropper can extract zero bit of information without getting uncovered. The scheme is naturally protected against the man-in-the-middle attack. The communication can take place also via currently used power lines or phone (wire) lines and it is not only a point-to-point communication like quantum channels but network-ready. We report that a pair of Kirchhoff-Loop-Johnson(-like)-Noise communicators, which is able to work over variable ranges, was designed and built. Tests have been carried out on a model-line with ranges beyond the ranges of any known direct quantum communication channel and they indicate unrivalled signal fidelity and security performance. This simple device has single-wire secure key generation/sharing rates of 0.1, 1, 10, and 100 bit/second for copper wires with diameters/ranges of 21 mm / 2000 km, 7 mm / 200 km, 2.3 mm / 20 km, and 0.7 mm / 2 km, respectively and it performs with 0.02% raw-bit error rate (99.98 % fidelity). The raw-bit security of this practical system significantly outperforms raw-bit quantum security. Current injection breaking tests show zero bit eavesdropping ability without setting on the alarm signal, therefore no multiple measurements are needed to build an error statistics to detect the eavesdropping as in quantum communication. Wire resistance based breaking tests of Bergou-Scheuer-Yariv type give an upper limit of eavesdropped raw bit ratio is 0.19 % and this limit is inversely proportional to the sixth power of cable diameter. Hao's breaking method yields zero (below measurement resolution) eavesdropping information.

Original languageEnglish
Title of host publicationNoise and Fluctuations in Circuits, Devices, and Materials
DOIs
Publication statusPublished - Nov 23 2007
EventNoise and Fluctuations in Circuits, Devices, and Materials - Florence, Italy
Duration: May 21 2007May 24 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6600
ISSN (Print)0277-786X

Other

OtherNoise and Fluctuations in Circuits, Devices, and Materials
CountryItaly
CityFlorence
Period5/21/075/24/07

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Keywords

  • Classical information
  • Computer heat
  • Secret key distribution
  • Stealth communication

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Kish, L. B., Mingesz, R., & Gingl, Z. (2007). Thermal noise informatics: Totally secure communication via a wire; Zero-power communication; and Thermal noise driven computing. In Noise and Fluctuations in Circuits, Devices, and Materials [660003] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6600). https://doi.org/10.1117/12.727078