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Introducing a Novel Data Over Voice Technique for Secure Voice Communication

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Abstract

The increasing need for privacy-preserving voice communications is encouraging the investigation of new secure voice transmission techniques. This paper refers to the original concept of sending encrypted data or speech as pseudo-speech in the audio domain over existing voice communication infrastructures, like 3G cellular network and Voice over IP (VoIP). The distinctive characteristic of such a communication system is that it relies on the robust transmission of binary information in the form of audio signal. This work presents a novel Data over Voice (DoV) technique based on codebooks of short harmonic waveforms. The technique provides a sufficiently fast and reliable data rate over cellular networks and many VoIP applications. The new method relies on general principles of Linear Predictive Coding for voice compression (LPC voice coding) and is more versatile compared to solutions trained on exact channel models. The technique gives by design a high control over the desired rate of transmission and provides robustness to channel distortion. In addition, an efficient codebook design approach inspired by quaternary error correcting codes is proposed. The usability of the proposed DoV technique for secure voice communication over cellular networks and VoIP has been successfully validated by empirical experiments. The paper details the system parameters, putting a special emphasis on system’s security and technical challenges.

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Availability of data and materials

Examples of some DoV signals recorded during tests are available online at https://github.com/PiotrKrasnowski/Data_over_Voice.

Notes

  1. https://core.telegram.org, https://signal.org.

  2. https://github.com/PiotrKrasnowski/Data_over_Voice.

  3. https://rowetel.com.

  4. https://www.gnu.org/software/octave/.

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Funding

This work is supported by Grant DGA Cifre-Defense Program No. 01D17022178 DGA/DS/MRIS and AID Program No. SED0456JE75.

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  1. University Côte d’Azur - Lab. I3S-CNRS, 2000, route des Lucioles, 06900, Sophia Antipolis, France

    Piotr Krasnowski, Jerome Lebrun & Bruno Martin

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  1. Piotr Krasnowski
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Correspondence to Piotr Krasnowski.

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Krasnowski, P., Lebrun, J. & Martin, B. Introducing a Novel Data Over Voice Technique for Secure Voice Communication. Wireless Pers Commun 124, 3077–3103 (2022). https://doi.org/10.1007/s11277-022-09503-6

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