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Acoustic Integrity Codes: Secure Device Pairing Using Short-Range Acoustic Communication

Putz, Florentin and Álvarez, Flor and Classen, Jiska (2020):
Acoustic Integrity Codes: Secure Device Pairing Using Short-Range Acoustic Communication.
In: WiSec 2020: 13th ACM Conference on Security and Privacy in Wireless and Mobile Networks, virtual Conference, July 08.-10., pp. 31-41, ISBN 978-1-4503-8006-5,
DOI: 10.1145/3395351.3399420,
[Online-Edition: https://wisec2020.ins.jku.at/],
[Conference or Workshop Item]

Abstract

Secure Device Pairing (SDP) relies on an out-of-band channel to authenticate devices. This requires a common hardware interface, which limits the use of existing SDP systems. We propose to use short-range acoustic communication for the initial pairing. Audio hardware is commonly available on existing off-the-shelf devices and can be accessed from user space without requiring firmware or hardware modifications. We improve upon previous approaches by designing Acoustic Integrity Codes (AICs): a modulation scheme that provides message authentication on the acoustic physical layer. We analyze their security and demonstrate that we can defend against signal cancellation attacks by designing signals with low autocorrelation. Our system can detect overshadowing attacks using a ternary decision function with a threshold. In our evaluation of this SDP scheme’s security and robustness, we achieve a bit error ratio below 0.1% for a net bit rate of 100 bps with a signal-to-noise ratio (SNR) of 14 dB. Using our open-source proof-of-concept implementation on Android smartphones, we demonstrate pairing between different smartphone models.

Item Type: Conference or Workshop Item
Erschienen: 2020
Creators: Putz, Florentin and Álvarez, Flor and Classen, Jiska
Title: Acoustic Integrity Codes: Secure Device Pairing Using Short-Range Acoustic Communication
Language: English
Abstract:

Secure Device Pairing (SDP) relies on an out-of-band channel to authenticate devices. This requires a common hardware interface, which limits the use of existing SDP systems. We propose to use short-range acoustic communication for the initial pairing. Audio hardware is commonly available on existing off-the-shelf devices and can be accessed from user space without requiring firmware or hardware modifications. We improve upon previous approaches by designing Acoustic Integrity Codes (AICs): a modulation scheme that provides message authentication on the acoustic physical layer. We analyze their security and demonstrate that we can defend against signal cancellation attacks by designing signals with low autocorrelation. Our system can detect overshadowing attacks using a ternary decision function with a threshold. In our evaluation of this SDP scheme’s security and robustness, we achieve a bit error ratio below 0.1% for a net bit rate of 100 bps with a signal-to-noise ratio (SNR) of 14 dB. Using our open-source proof-of-concept implementation on Android smartphones, we demonstrate pairing between different smartphone models.

ISBN: 978-1-4503-8006-5
Uncontrolled Keywords: physical-layer security, signal cancellation, secure device pairing, acoustic communication, trust, integrity codes, android, internet of things, digital signal processing, emergenCITY_KOM
Divisions: 20 Department of Computer Science
20 Department of Computer Science > Sichere Mobile Netze
Profile Areas
Profile Areas > Cybersecurity (CYSEC)
LOEWE
LOEWE > LOEWE-Zentren
LOEWE > LOEWE-Zentren > CRISP - Center for Research in Security and Privacy
LOEWE > LOEWE-Zentren > emergenCITY
Event Title: WiSec 2020: 13th ACM Conference on Security and Privacy in Wireless and Mobile Networks
Event Location: virtual Conference
Event Dates: July 08.-10.
Date Deposited: 22 Jul 2020 06:50
DOI: 10.1145/3395351.3399420
Official URL: https://wisec2020.ins.jku.at/
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