Automatic detection and analysis of biotic and anthropogenic sounds recorded by ocean bottom seismometers
I3S-CNRS
Since January 2021, I participate in the project NautiLUS which aims at understanding the impact of anthropogenic noise on marine life. My work focuses on the automatic detection and analysis of large datasets from the geosciences community.
The large datasets originate from the acoustic and seismic signals recorded by networks of sensors (OBS/H) distributed on the seafloor, hundreds of meters below the sea level. Apart from seismologically-oriented data, these sensors capture different marine sounds, including whale songs, engines of large ships, and meteorological phenomena. To deal with such large datasets and to assess the consequences of anthropogenic noise, we investigate and develop efficient Machine Learning techniques.
Joint coding for secure voice communications over voice channels
Université Côte d’Azur • I3S-CNRS
Between 2017-2020, I was a Ph.D. student under the supervision of Prof. Bruno Martin and Dr. Jerome Lebrun at I3S-CNRS. My work focused on developing new cryptographic schemes for secure voice communications.
Unlike classical encode-then-encrypt systems (e.g., WhatsApp, Signal), I follow a joint approach, where speech is encrypted directly into a pseudo-vocal signal. Such an encrypted signal could be processed the same way as a natural speech waveform (compression, noisy transmission) without loss of enciphered information.
The research covers a wide range of topics: from lightweight cryptography, through advanced speech processing, to neural networks and error correction mechanisms.
The project was funded by the Direction Générale de l’Armement (2017-2020) and the Agence de l’Innovation de Défense (2020), the French Ministry of Defence.
The research led to a publication:
P. Krasnowski, J. Lebrun, B. Martin, “Introducing an Experimental Distortion-Tolerant Speech Encryption Scheme for Secure Voice Communication” (submitted). Preprint: https://arxiv.org/abs/2102.09809.
Voice Encryption (VE) device for real-time voice communications over voice channels
Université Côte d’Azur • I3S-CNRS • BlackBoxSecu
Between December 2017 and January 2020, I worked as a Ph.D. student and a research engineer at a cybersecurity startup BlackBoxSecu. The project aimed at improving the performance and security of the Voice Encryption (VE) device for real-time ultra-secure voice communications.
The VE device combined with a mobile phone may become a cheaper and more flexible alternative to Crypto-Phones. The device enciphers recorded speech and produces a corresponding noise-like pseudo-speech. In the next step, the enciphered audio signal is sent over 3G/4G networks or VoIP (Skype, WhatsApp, Telegram) in place of standard voice and deciphered by a paired VE device sharing a cryptographic key.
The work was co-funded by the Direction Générale de l’Armement, the French Ministry of Defence, and BlackBoxSecu.
The research led to publications:
1. P. Krasnowski, J. Lebrun, B. Martin, “Introducing a Verified Authenticated Key Exchange Protocol over Voice Channels for Secure Voice Communication” ICISSP 2020, Valletta, Malta. DOI: 10.5220/0009156506830690.
2. P. Krasnowski, J. Lebrun, B. Martin, “Introducing a Novel Data over Voice Technique for Secure Voice Communication” (submitted). Preprint: https://arxiv.org/abs/2102.10869.
Thermoacoustic Imaging for Breast Cancer Detection
The University of Nottingham •
The Wroclaw University of Science and Technology
A study investigated the possibility of replacing cancerogenic mammography by a safe technique that combines thermoacoustics, microwave bio-radiolocation, and thermography. I tried to determine if these three systems could operate simultaneously on the same instrumentation, to reduce costs and acquisition time. My work included simulative tests and real experiments conducted at the Military University of Technology, Poland.
My work was supervised by Prof. Trevor Benson and dr Grzegorz Jaworski and led to a publication:
P. Krasnowski, G. Jaworski, “Software arbitrary signal generator on the PXI platform for application in microwave medical diagnostic system development” MIKON 2018, Poznan, Poland. DOI: 10.23919/MIKON.2018.8405298.
S-band transmitter for European Space Earth Orbiter satellite
The Wroclaw University of Science and Technology •
R&D Group: Onboard Telecommunication Electronics for Spacecrafts and Transportation
During my studies in Wroclaw, I was learning and working as a research student in the R&D Group: Onboard Telecommunication Electronics for Spacecrafts and Transportation, led by Dr. Pawel Kabacik. I had a great pleasure to participate in the development of a satellite S-band transmitter for the European Space Earth Orbiter (ESEO) project coordinated by the European Space Agency (ESA). My work focused on error-correction coding and hardware/software testing.
Besides, I was involved into several other projects, like airborne navigation radar and synthetic aperture radar for automatic oil-spill detection on the Arctic Sea.