According to the GDPR, personal data is defined as “any information relating to an identified or identifiable natural person (“ information holder ”); an identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier, such as a name, an identification number, location data, an online identifier or one or more factors specific to the physical, physiological , genetic, mental, economic, cultural or social identity of that natural person. ”