The SESNA project is a French national R & D project on autonomous vehicles financed by BPI France and the Ile-de-France region. RATP, CEA, Bureau Veritas, Sherpa Engineering, EasyMile and BMCP are the consortium partners. The project objectives are to assess the risks of cyber attacks and to verify that autonomous vehicles are resistant and resilient to hacker attacks. The CEA Paris-Saclay - which is a sensitive site due to its civil research activities – hosts this trial project. Performed in a semi-open environment, its purpose is to test the viability of an autonomous shuttle system in a continuous and cybersafe operation.