Secure space–time-modulated millimetre-wave wireless links that are resilient to distributed eavesdropper attacks

Suresh Venkatesh, Xuyang Lu, Bingjun Tang, Kaushik Sengupta

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

As wireless networks move to millimetre-wave (mm-wave) and terahertz (THz) frequencies for 5G communications and beyond, ensuring security and resilience to eavesdropper attacks has become increasingly important. Traditional encryption methods are challenging to scale for high-bandwidth, ultralow-latency applications. An alternative approach is to use physical-layer techniques that rely on the physics of signal propagation to incorporate security features without the need for an explicit key exchange. Ensuring security through the use of directional, narrow-beam-like features of mm-wave/THz signals has proven to be vulnerable to passive eavesdroppers. Here we report a space-time modulation approach that ensures security by enforcing loss of information through selective spectral aliasing towards the direction of eavesdroppers, even though the channel can be physically static. This is achieved by using custom-designed spatio-temporal transmitter arrays realized in silicon chips with packaged antennas operating in the 71–76 GHz range. We also analytically and experimentally demonstrate the resilience of our links against distributed and synchronized eavesdropper attacks in the mm-wave band.

Original languageEnglish (US)
Pages (from-to)827-836
Number of pages10
JournalNature Electronics
Volume4
Issue number11
DOIs
StatePublished - Nov 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Secure space–time-modulated millimetre-wave wireless links that are resilient to distributed eavesdropper attacks'. Together they form a unique fingerprint.

Cite this