Surveillance is two-sided, and its benefits must be acknowledged. Yet at the same time risks and dangers are always present in large-scale systems and of course power does corrupt or at least skews the vision of those who wield it. Large-scale technological infrastructures are peculiarly prone to large-scale problems. And especially where computer systems are...

After recalling why data protection is indispensable to our societies, this text analyses in detail the risks which today weigh on individual liberties and data protection around the world, and which represent as many challenges for supervisory authorities. It derives from this statement various proposals for coordinated actions and initiatives, as well as for the...