SmartAttack: Air-Gap Attack via Smartwatches

• URL: http://arxiv.org/abs/2506.08866v1
• Date: Tue, 10 Jun 2025 14:56:21 GMT
• Title: SmartAttack: Air-Gap Attack via Smartwatches
• Authors: Mordechai Guri,
• Abstract summary: We propose and evaluate SmartAttack, a novel method that leverages smartwatches as receivers for ultrasonic covert communication in air-gapped environments.<n>Our approach utilizes the built-in microphones of smartwatches to capture covert signals in real time within the ultrasonic frequency range of 18-22 kHz.<n>Our findings highlight the security risks posed by smartwatches in high-security environments and outline mitigation strategies to counteract this emerging threat.
• Score: 1.74048653626208
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Air-gapped systems are considered highly secure against data leaks due to their physical isolation from external networks. Despite this protection, ultrasonic communication has been demonstrated as an effective method for exfiltrating data from such systems. While smartphones have been extensively studied in the context of ultrasonic covert channels, smartwatches remain an underexplored yet effective attack vector. In this paper, we propose and evaluate SmartAttack, a novel method that leverages smartwatches as receivers for ultrasonic covert communication in air-gapped environments. Our approach utilizes the built-in microphones of smartwatches to capture covert signals in real time within the ultrasonic frequency range of 18-22 kHz. Through experimental validation, we assess the feasibility of this attack under varying environmental conditions, distances, orientations, and noise levels. Furthermore, we analyze smartwatch-specific factors that influence ultrasonic covert channels, including their continuous presence on the user's wrist, the impact of the human body on signal propagation, and the directional constraints of built-in microphones. Our findings highlight the security risks posed by smartwatches in high-security environments and outline mitigation strategies to counteract this emerging threat.

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