Implementation of a secure link using PHYSEC based on software-defined radio (SDR)

CEA - groupe; Auvergne-Rhône-Alpes; Sur place; EUR 30 000 - 45 000; Plein temps

Résumé du poste

A leading research institute in France is seeking an engineering student to develop and test secure communication models using MATLAB and Python. Candidates should be proficient in signal processing and digital communication. Responsibilities include developing a model for secure transmission chains and integrating it for real-time testing. This position is ideal for Master 2 students interested in hands-on applications of theoretical research.

Qualifications

• Studying signal processing and digital communications.
• Proficient in MATLAB and Python for modeling.
• Experienced in using laboratory instruments.

Responsabilités

• Develop a model of a secure transmission chain.
• Implement concepts for transmission, synchronization, and equalization.
• Conduct integration testing using Hardware-in-the-Loop methodology.

Connaissances

Signal processing

Digital communication

MATLAB

Python

Using laboratory instruments

Formation

Master 2

Outils

C

Description du poste

Context

Physical layer security (PHYSEC) enhances communication confidentiality by leveraging the inherent characteristics of the wireless channel. It protects transmitted data against eavesdropping without relying solely on higher‑layer encryption. PHYSEC techniques include secure modulation, coding, and beamforming to exploit channel randomness. It ensures that legitimate receivers can reliably decode messages while making interception by attackers difficult. The aim of this work is to demonstrate the practical feasibility of the PHYSEC concepts developed within the laboratory by implementing and testing them using a software‑defined radio (SDR) platform. This study seeks to validate the effectiveness of these security techniques in realistic transmission scenarios, bridging the gap between theoretical research and experimental implementation.

Your missions

The first task will be to develop, on top of existing work, a Matlab / Python model of a secure transmission chain, including channel coding and modulation. The waveform and security aspects will come from ongoing research conducted by a Ph.D. student. The candidate’s role will be to implement these concepts and all related components for transmission, synchronization, and equalization, with guidance and support from senior researchers in the field. Once the simulation model has been validated, integration onto a Hardware‑in‑the‑Loop (HiL) platform will be carried out. The HiL methodology allows testing of the transmission chain in real‑time conditions by interfacing the simulation model with actual hardware components, enabling realistic evaluation of performance under controlled scenarios. Finally, a measurement campaign using a channel emulator, and if feasible over‑the‑air testing, will be conducted to demonstrate the benefits of the proposed concept.

Required skills

• Signal processing and digital communication
• MATLAB / Python

Proficient in using laboratory instruments

Profile

Eleve Ingénieur, Master 2.

Compétences : traitement du signal, communicaiton numériques, MATLAB / Python / C

Starting date

02-02