55 The need for such safeguards is all the greater where, as laid down in Directive 2006/24, personal data are subjected to automatic processing and where there is a significant risk of unlawful access to those data (see, by analogy, as regards Article 8 of the ECHR, S. and Marper v. the United Kingdom, § 103, and M. K. v. France, 18 April 2013, no. 19522/09, § 35).56 As for the question of whether the interference caused by Directive 2006/24 is limited to what is strictly necessary, it should be observed that, in accordance with Article 3 read in conjunction with Article 5(1) of that directive, the directive requires the retention of all traffic data concerning fixed telephony, mobile telephony, Internet access, Internet e-mail and Internet telephony. It therefore applies to all means of electronic communication, the use of which is very widespread and of growing importance in people’s everyday lives. Furthermore, in accordance with Article 3 of Directive 2006/24, the directive covers all subscribers and registered users. It therefore entails an interference with the fundamental rights of practically the entire European population. 57 In this respect, it must be noted, first, that Directive 2006/24 covers, in a generalised manner, all persons and all means of electronic communication as well as all traffic data without any differentiation, limitation or exception being made in the light of the objective of fighting against serious crime.