 Underwater Acoustics work resides in the interaction between real work and the development of physical models and signal processing tools (time-frequency analysis).One of the group's research projects is Cyber Defense related to the Chair of Cyber Defense of Naval Systems.The Chair of "Cyber Defense of Naval Systems" was created in October 2014 under the tutelage of the French Navy as part of the Cyber Action Plan decided by the Minister of the Armed Forces ; it hasa strong legitimacy in the naval field.