Big Data allows us to produce rich and sometimes sensitive data from information which is purportedly insignificant. These evolutions will have to face up to the multidimensional explosion of cyber threats. Cyber-attacks are becoming more and more frequent in organized structures and tend to use widely accessible tools. The C&ESAR conference 2017 aims to address data protection in this new landscape. IMT Atlantique is a partner of this event, organized in the context of European Cyber Week.