Artur Ekert, University of Oxford
Among those who make their living out of science of secrecy, worrying and paranoia are just a sign of professionalism. Can we protect our secrets against those who wield superior technological powers? Can we trust those who provide us with tools for protection? Finally, can we trust ourselves, our freedom of choice, our free will?
Amazingly enough, recent developments in quantum cryptography show that some of these questions can be addressed and discussed in precise and operational terms. More than that, the field has something to offer to the most paranoid ones.