EMTap: Eavesdropping on Sound Transmitted via Audio Cables by Sensing Electromagnetic Variation Using RFID Article Swipe
Yunzhong Chen
,
Jiadi Yu
,
Hao Kong
,
Daqiang Zhang
,
Yanmin Zhu
,
Hong‐Ning Dai
,
Yi‐Chao Chen
,
Linghe Kong
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1145/3749459
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1145/3749459
When sound signals are transmitted via audio cables in form of current signals, detectable electromagnetic leakage is emitted around the cables, which could reveal the sound content being transmitted. This paper presents a sound eavesdropping system, EMTap, which senses electromagnetic variation around audio cables leveraging an RFID tag attached to an audio cable for sound content recovery. In some audiovisual scenarios with audio cables, such as offices and meeting rooms, it is assumed that attackers secretly attach a small, battery-free RFID tag to an audio cable without being noticed. Meanwhile, RFID readers are camouflaged as decorations/public facilities placed in/out of rooms to transmit and receive RF signals. When the sound signals are transmitted via audio cables, EMTap first activates the RFID tag to capture the electromagnetic variation patterns around audio cables upon RF signals. Then, EMTap reconstructs sound spectrograms from RF signal-based electromagnetic variation patterns utilizing a designed cross-modal Generative model, Nonlinear Stable Diffusion Model (NSDM). Finally, EMTap converts the sound spectrograms to sound content through sound recognition API. Extensive experiments demonstrate that EMTap achieves an average Mel-Cepstral Distortion (MCD) of 5.49 and Word Error Rate (WER) of 16.19% for eavesdropping on sound transmitted via audio cables.
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Concepts
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1145/3749459
- https://dl.acm.org/doi/pdf/10.1145/3749459
- OA Status
- bronze
- References
- 50
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4413968555
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4413968555Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1145/3749459Digital Object Identifier
- Title
-
EMTap: Eavesdropping on Sound Transmitted via Audio Cables by Sensing Electromagnetic Variation Using RFIDWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2025Year of publication
- Publication date
-
2025-09-03Full publication date if available
- Authors
-
Yunzhong Chen, Jiadi Yu, Hao Kong, Daqiang Zhang, Yanmin Zhu, Hong‐Ning Dai, Yi‐Chao Chen, Linghe KongList of authors in order
- Landing page
-
https://doi.org/10.1145/3749459Publisher landing page
- PDF URL
-
https://dl.acm.org/doi/pdf/10.1145/3749459Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
bronzeOpen access status per OpenAlex
- OA URL
-
https://dl.acm.org/doi/pdf/10.1145/3749459Direct OA link when available
- Concepts
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Eavesdropping, Sound (geography), Variation (astronomy), Acoustics, Audio frequency, Computer science, Telecommunications, Sound pressure, Computer security, Physics, AstrophysicsTop concepts (fields/topics) attached by OpenAlex
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0Total citation count in OpenAlex
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50Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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| primary_location.is_published | True |
| primary_location.raw_source_name | Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies |
| primary_location.landing_page_url | https://doi.org/10.1145/3749459 |
| publication_date | 2025-09-03 |
| publication_year | 2025 |
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