Analysis of the Compromising Audio Signal From the Emission Security Perspective

Trip, Bogdan; Butnariu, Vlad; Velicu, Valentin; Halunga, Simona; Boitan, Alexandru

doi:10.1109/comm48946.2020.9142022

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…At the same time, it is of particular importance in military and civilian environments, where classified information is conveyed. This signal's importance, also presented in other publications [5,7,25] in different manners, leads to the development of new methods for IT equipment compromising electromagnetic emissions' detection.…”

Section: Discussionmentioning

confidence: 72%

“…With the advent of digital technologies, the audio signal bandwidth for VoIP telephony has been widened from 50 Hz to 7 kHz [24]. As in this work, those aspects are addressed in the paper [25], which emphasizes the presence of audio CE. In this work, it is presented that an electronic device with proper functioning can lead to the audio signal being unintentionally modulated and emitted in the electromagnetic spectrum within the frequency range of 1 MHz to 1000 MHz.…”

Section: Related Workmentioning

confidence: 97%

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Detection of the Compromising Audio Signal by Analyzing Its AM Demodulated Spectrum

Vizitiu,

Dobrescu,

Trip

et al. 2024

Symmetry

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The information technology and communication (IT&C) market consists of computing and telecommunication technology systems, which also include a variety of audio devices. Preserving the confidentiality of transmitted information through these devices stands as a critical concern across various domains and businesses. Notably, spurious electromagnetic emanations emitted by audio devices can be captured and processed, potentially leading to eavesdropping incidents. The evaluation of electronic devices for potential security vulnerabilities often involves employing Transient Electromagnetic Pulse Emanation Standard (TEMPEST) technology. This paper introduces a novel approach to TEMPEST testing specifically tailored for audio devices. The outcomes of the proposed approach offer valuable insights into TEMPEST equipment testing, aiming to mitigate the potential risks posed by threats exploitable by eavesdroppers in everyday scenarios. The present work delves into the examination of two ubiquitous global electronic devices: a notebook and a pair of in-ear headphones. The symmetrical framework of this study arises from the intrinsic similarity that, despite belonging to distinct categories, both devices possess the capability to emit electromagnetic emissions that contain compromised audio signals. This assertion is substantiated by the measurement results presented herein. The proposed methodology involves the analysis of the audio amplitude modulation (AM) demodulated signal in the frequency domain. This innovative approach not only mitigates operator fatigue but also significantly reduces the testing time required for these devices and instrument running hours and leads to the development of new applications.

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Section: Discussionmentioning

confidence: 72%

Section: Related Workmentioning

confidence: 97%

Detection of the Compromising Audio Signal by Analyzing Its AM Demodulated Spectrum

Vizitiu,

Dobrescu,

Trip

et al. 2024

Symmetry

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“…The emissions can be used in the process of obtaining information about the shape of this object non-invasively. This may result in premature disclosure of project results [19][20][21][22][23]. The article focuses on issues related to the acoustic emission of printers (E acoustic ) in the side channel.…”

mentioning

confidence: 99%

Evaluation of the Effectiveness of Protecting Three-Dimensional Printers against Acoustic Infiltration

Stańczak,

Kubiak

2023

Electronics

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Three-dimensional printers are increasingly used in design work when designers want to quickly and inexpensively verify their solutions. However, based on the sounds made by the printer during its operation, it is possible to determine the shape of the printed object with quite high accuracy. The above fact should be taken into account if information about this object needs to be protected. The article presents a way to protect a 3D (Three-Dimensional) printer against acoustic infiltration. The research study was carried out using the Zortrax M200 Plus printer for LPD (Layer Plastic Deposition) technology, which is an equivalent of the popular FDM/FFT (Fused Deposition Modeling/Fused Filament Fabrication) 3D printing technology using thermoplastic. The frequencies of acoustic signals related to the operation of stepper motors and the printing platform were identified. These signals enable the reconstruction of the shape of printed objects. It was examined whether the appropriate type and required level of masking noise can be selected for a given type of printer in order to protect it against acoustic infiltration. The masking properties of selected color noises were compared with those of white noise and the optimal intensity levels were determined at which the acoustic safety of the tested printer can be ensured. It was underlined that the research results refer only to the tested printer and should not be generalized to other types of 3D printers.

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Experimental Study of Shielding Composite Materials for Protection of Computer Systems

Velicu

Butnariu

Trip

et al. 2021

2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)

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Analysis of the Compromising Audio Signal From the Emission Security Perspective

Cited by 3 publications

References 5 publications

Detection of the Compromising Audio Signal by Analyzing Its AM Demodulated Spectrum

Detection of the Compromising Audio Signal by Analyzing Its AM Demodulated Spectrum

Evaluation of the Effectiveness of Protecting Three-Dimensional Printers against Acoustic Infiltration

Experimental Study of Shielding Composite Materials for Protection of Computer Systems

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