How can Quantum Cryptography Contribute to Cyber Security?

Nicolas Gisin

Quantum physics is a natural source of entropy: randomness out of (almost) nothing! Moreover, the same random event can manifest itself at several locations. Hence quantum physics is a natural building block for cryptography, i.e. it offers Quantum Key Distribution. However, physicists are not cryptographers, not more than cryptographers are physicists. The two communities must meet to overcome some of today’s challenges.