Claudia Ignat (Coast team) will defend her HDR (Habilitation à Diriger des Recherches), entitled "Large-scale trustworthy distributed collaborative systems" on Friday April 23 at 3pm. The defense will be held in English. Short abstract: Most existing collaborative systems rely on a central authority and place personal information in the hands of a single large corporation which is a perceived privacy threat. Moreover, these systems do not scale well in terms of the number of users and their modifications. My research work aims to move away from…