National audienceThe complexity of distributed systems continuously increases and their usage is widened into a variety of contexts. Users do several activities through these systems like sharing data, chatting, buying online, etc. Persons, hardware and software are involved in activities so we consider a system as the representation of two worlds, the social and the digital worlds. Trust plays an important role in helping users to analyze the danger or risk they incur when doing an activity. Research on trust notions has focused on the social entities where a trustee is a person or an organization of persons. Recent research analyzes trust toward the digital world i.e., technologies. We consider that having these two building blocks is not enough for a user to decide if she can confidently do an activity in a particular system. Such decision requires to consider the system organization as a whole because it determines whom and what would be involved in a user activity and how. This article focuses on this problem and provides first ideas for solution
