嗡嗡声:背景噪声作为移动设备录音中ENF伪影的载体

2014 Eighth International Conference on IT Security Incident Management & IT Forensics Pub Date : 2014-05-12 DOI:10.1109/IMF.2014.14

Niklas Fechner, Matthias Kirchner

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引用次数: 33

摘要

基于网络频率波动(ENF)的音频取证已成为数字音频认证的主要方法之一。然而，对于电池供电的设备在其录音中留下ENF伪影的环境和前提条件，人们知之甚少。我们对多个移动录音设备的研究证实了这样一个假设，即由靠近录音设备的电源供电的电子设备产生的背景噪声是ENF伪影的载体。在室内环境下的实验表明了非常高的鲁棒性，并表明即使在噪声源之外的多个房间也存在ENF伪像。

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The Humming Hum: Background Noise as a Carrier of ENF Artifacts in Mobile Device Audio Recordings

Audio forensics based on fluctuations in the electrical network frequency (ENF) has become one of the major approaches for the authentication of digital audio recordings. Yet little is known about the circumstances and preconditions under which battery-powered devices leave ENF artifacts in their recordings. Our study with multiple mobile recording devices confirms the hypothesis that background noise, generated by mains-powered electronic devices in proximity to the recording device, is a carrier of ENF artifacts. Experiments in an indoor setting suggest a very high robustness and indicate the presence of ENF artifacts even multiple rooms apart from the noise source.

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2014 Eighth International Conference on IT Security Incident Management & IT Forensics

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