The French National Commission for Computing and Liberties (CNIL) was created by the Data Protection Act of 6 January 1978. It is responsible for ensuring the protection of personal data contained in computer or paper files and processing, both public and private.

An identified and very limited number of agents of the INSEE have access to the data that identify a person. These are only used for the proper organization of data collection and certain statistical processing. They are then deleted from the databases, so that it is impossible to find an individual in the data tables made available. A detailed archiving procedure makes it possible to control the data made available.