Profitability imperatives can lead companies to share, re-use and commercialise data. I decided to take a particular interest in the data obtained from connected objects, because these are now invading our wrists, homes and offices, and are helping to bring about a profound change in our society. I wanted to look at the questions raised by the use of these objects in their early days. What do they tell us about ourselves? What legal rules exist to date concerning respect for privacy? Has there been any case law? Who can use the personal data collected by these objects? For what purpose? A number of fears will be expressed, often linked to the lack of clarity surrounding the use of this data by companies. We will also attempt to identify recommended solutions for respecting users' privacy and securing their data, while proposing an action plan for implementing them.