Article 230-1 of the French Code of Criminal Procedure
Without prejudice to the provisions of articles 60, 77-1 and 156, where it appears that data seized or obtained in the course of the investigation or enquiry has been subject to transformation operations preventing access to or understanding of the unencrypted information contained therein, or that this data is protected by an authentication mechanism, the public prosecutor, the investigating court, the judicial police officer, with the authorisation of the public…