  The study we carried out enabled us to extract some conclusions, which are
contrasted with the results obtained. First, in the field of mobile
applications, permissions and tracers are almost always present. Android, as
far as PlayStore permissions are concerned, is the main entity concerning this
domain. Under the pretext of guaranteeing an optimal functioning of the
applications, these permissions can sometimes hide some very dangerous tracing
means for the users. Google, a major player in tracing and a major power in the
storage of information of net users, is behind most tracers. Trackers have two
main missions. On the one hand, they allow the application to work, like
Facebook's trackers that are used to log into the application or Google's
trackers that allow either to trace crashes or to analyze how the application
is used. On the other hand, they allow you to manage the advertising that
appears in the application, which can be targeted or not. Regarding tracking in
emails, we find stakeholders quite present: Google, Xiti and Iroquois. Even if
they are most often used in the context of hearing measurements, they are
present in public service emails. Finally with websites, Google is very present
in government websites. We find common actors for applications and emails such
as GAFAM or Xiti. Most of the cookies present are for audience measurement and
advertising display which is often targeted.
