VoiceGuard: An Effective and Practical Approach for Detecting and Blocking Unauthorized Voice Commands to Smart Speakers

Xuening Xu, Chenglong Fu, Xiaojiang Du, E. Paul Ratazzi

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

2 Scopus citations

Abstract

Smart speakers bring convenience to people's daily lives. However, various attacks can be launched against smart speakers to execute malicious commands, which may cause serious safety or security issues. The existing solutions against sophisticated attacks such as voice replay attacks and voice synthesis attacks require intrusive modifications of the smart speaker hardware and/or software, which are impractical for general users. In this work, we present a novel security scheme- VoiceGuard that can effectively detect and block unauthorized voice commands to smart speakers. VoiceGuard does not require any modification to smart speakers' hardware or software. We implement a prototype of VoiceGuard on two popular smart speakers: Amazon Echo Dot and Google Home Mini, and evaluate the scheme in three real-world testbeds, which include both single-user and multi-user scenarios. The experimental results show that VoiceGuard achieves an accuracy of 97% in blocking malicious voice commands issued by illegitimate sources while having a negligible impact on the user experience.

Original languageEnglish
Title of host publicationProceedings - 2023 53rd Annual IEEE/IFIP International Conference on Dependable Systems and Networks, DSN 2023
Pages582-596
Number of pages15
ISBN (Electronic)9798350347937
DOIs
StatePublished - 2023
Event53rd Annual IEEE/IFIP International Conference on Dependable Systems and Networks, DSN 2023 - Porto, Portugal
Duration: 27 Jun 202330 Jun 2023

Publication series

NameProceedings - 2023 53rd Annual IEEE/IFIP International Conference on Dependable Systems and Networks, DSN 2023

Conference

Conference53rd Annual IEEE/IFIP International Conference on Dependable Systems and Networks, DSN 2023
Country/TerritoryPortugal
CityPorto
Period27/06/2330/06/23

Keywords

  • Bluetooth RSSI
  • attacks
  • smart speakers

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