Recital 20

The concept of ‘public security’, within the meaning of Article 52 TFEU and as interpreted by the Court of Justice, covers both the internal and external security of a Member State, as well as issues of public safety, in order, in particular, to facilitate the investigation, detection and prosecution of criminal offences. It presupposes the existence of a genuine and sufficiently serious threat affecting one of the fundamental interests of society, such as a threat to the functioning of institutions and essential public services and the survival of the population, as well as the risk of a serious disturbance to foreign relations or the peaceful coexistence of nations, or a risk to military interests. In compliance with the principle of proportionality, data localisation requirements that are justified on grounds of public security should be suitable for attaining the objective pursued, and should not go beyond what is necessary to attain that objective.