Angularly Dispersive Terahertz Links with Secure Coding: From Theoretical Foundations to Experiments

Chia Yi Yeh, Alejandro Cohen, Rafael G.L. D'Oliveira, Muriel Médard, Daniel M. Mittleman, Edward W. Knightly

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

With the large bandwidths available in the terahertz regime, directional transmissions can exhibit angular dispersion, i.e., frequency-dependent radiation direction. Unfortunately, angular dispersion introduces new security threats as increased bandwidth necessarily yields a larger signal footprint in the spatial domain and potentially benefits an eavesdropper. This paper is the first study of secure transmission strategies on angularly dispersive links. Based on information theoretic foundations, we propose to channelize the wideband transmission in frequency, and perform secure coding across frequency channels. With over-the-air experiments, we show that the proposed method exploits the properties of angular dispersion to realize secure wideband transmissions, despite the increased signal footprint and even for practical irregular beams with side lobes and asymmetry. In contrast, without the proposed cross-channel coding strategy, angularly dispersive links can suffer from significant security degradation when bandwidth increases.

Original languageEnglish
Title of host publicationWiSec 2022 - Proceedings of the 15th ACM Conference on Security and Privacy in Wireless and Mobile Networks
PublisherAssociation for Computing Machinery, Inc
Pages268-273
Number of pages6
ISBN (Electronic)9781450392167
DOIs
StatePublished - 16 May 2022
Externally publishedYes
Event15th ACM Conference on Security and Privacy in Wireless and Mobile Networks, WiSec 2022 - Virtual, Online, United States
Duration: 16 May 202219 May 2022

Publication series

NameWiSec 2022 - Proceedings of the 15th ACM Conference on Security and Privacy in Wireless and Mobile Networks

Conference

Conference15th ACM Conference on Security and Privacy in Wireless and Mobile Networks, WiSec 2022
Country/TerritoryUnited States
CityVirtual, Online
Period16/05/2219/05/22

Keywords

  • angular dispersion
  • experiment
  • security
  • terahertz

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Information Systems
  • Software
  • Safety Research

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