Stage data science H/F - Poisoning attack against generative models

About the Internship

The internship is part of Orange's Flux Vision project, which aims to analyze people's mobility and presence in a territory using location data from the mobile network, while protecting privacy. To achieve this, Orange has developed a synthetic trajectory data generator to produce anonymized and representative data. The main objective of the internship is to conceptualize, develop, and test a methodology for poisoning attacks against these generators. This involves studying how to alter the model's learning process to influence the quality or confidentiality of synthetic data, while remaining difficult to detect.

Main Activities

Key activities include an in-depth study of the literature on poisoning attacks, particularly in the context of generative models and neural networks. The intern will need to familiarize themselves with existing trajectory generation models, understand their architecture and functioning, and then conduct experiments to evaluate their vulnerability to different perturbations. They will also be responsible for defining attack scenarios illustrating the potential impact on privacy and statistical representativeness of the data, showing how these attacks can manipulate or degrade the quality of synthetic data.

Subsequently, the intern will design and implement adapted poisoning strategies, training models subjected to simulated attacks, and evaluating their effectiveness in manipulating the output while remaining discreet. The validation of these methods will be done using a performance evaluation methodology, employing relevant metrics to measure the impact on data distribution, attack detection, and privacy protection. Finally, recommendations will be proposed to strengthen the robustness of generators against these threats.

Expected Results

The expected results are a better understanding of poisoning attack techniques in this context, concrete scenarios illustrating their feasibility, an operational attack methodology with exploitable prototypes, as well as avenues for improving the security and confidentiality of synthetic data generators.

Team and Environment

The intern will be integrated into a multidisciplinary team, working in an agile mode, with supervision by an experienced referent, in an innovative environment combining research, development, and security challenges related to data protection.

Your Profile

• Higher education degree (Bac +5 - Engineering school or University) in mathematics or computer science.
• Good knowledge of machine learning / deep neural networks issues and methods.
• Very good command of the Python programming language.
• Knowledge of Tensorflow is a plus.
• Adaptability and excellent interpersonal and writing skills (French and English).
• Sensitivity to ethical issues and data confidentiality.

About Orange Innovation Networks

You will join the Orange Innovation Networks teams, a strategic hub at the heart of Orange's research and development. This is where we imagine and build the networks of tomorrow, exploring cutting-edge technologies to transform how data is used.

More specifically, you will join the Flux Vision team, specializing in the processing and valorization of operator data. You will be fully immersed within a dynamic team of passionate data scientists and engineers. You will benefit from close technical and business support, and will have the opportunity to interact with a diversity of internal experts (radio engineers, legal experts, product managers). This is an environment where innovation is the driving force and where each project contributes to shaping the future of connectivity and digital services, particularly through the ethical and responsible valorization of data.

Start Date

Desired start date: April 20, 2026, 12:00 AM

At Orange, only your skills matter.

Regardless of your age, gender, origin, background, religion, sexual orientation, disability, neurodiversity, or appearance, we actively encourage diversity within our teams, as it is a strength for the collective and a driver of innovation. Orange is an inclusive employer: do not hesitate to let us know about your specific needs.