The Artificial Intelligence area of the CRIStAL laboratory studies the theoretical foundations and applications of learning algorithms, se- quential decision-making under uncertainty, neuromorphic architec- tures and multi-agent systems for the simulation of complex sys- tems. This research explores a variety of contexts: privacy, equity, decentralisation, multimedia security, using optimisation methods (game theory, HPC) and uncertainty quantification. It is applied to signal, natural language and music processing, the calculation of integro-differential equations and market equilibria, video protec- tion, agro-ecology, and simulation in a multi-disciplinary context (economists, sociologists, financial, ethologists, etc.).