Pattern-based alignment of audio data for ad hoc secure device pairing

Ngu Nguyen*, Stephan Sigg, An Huynh, Yusheng Ji

*Corresponding author for this work

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

4 Citations (Scopus)


When studying the use of ambient audio to generate a secure cryptographic shared key among mobile phones, we encounter a misalignment problem for recorded audio data. The diversity in software and hardware causes mobile phones to produce badly-aligned audio chunks. It decreases the identical fraction in audio samples recorded in nearby mobile phones and consequently the common information available to create a secure key. Unless the mobile devices are real-time capable, this problem can not be solved with standard distributed time synchronisation approaches. We propose a pattern-based approximative matching process to achieve synchronisation independently on each device. Our experimental results show that this method can help to improve the similarity of the audio fingerprints, which are the source to create the communication key.

Original languageEnglish
Title of host publicationProceedings - 16th International Symposium on Wearable Computers, ISWC 2012
Number of pages4
ISBN (Print)9780769546971
Publication statusPublished - 27 Sep 2012
MoE publication typeA4 Article in a conference publication
EventInternational Symposium on Wearable Computers - Newcastle, United Kingdom
Duration: 18 Jun 201222 Jun 2012
Conference number: 16


ConferenceInternational Symposium on Wearable Computers
Abbreviated titleISWC
CountryUnited Kingdom


  • device pairing
  • mobile computing
  • pattern matching
  • security

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