Re:Are we forgetting something (Score 1)

it's funny because each time there is a subject about quantum cryptography, there is someone clever than other to tell us that "quantum cryptography is vulnerable to man-in-the-middle attacks!". And each time we must repeat that, well, it's not. Not because the quantum physics prevents MITM (it don't) but cause we know unconditionnal algorithms (see Wegman-Carter MAC) that can makes a channel authenticated. For discussion about authentication and Quantum Cryptography see Gilbert and Hamrick "Practical quantum cryptography". About the russian guys that "done research on this", the paper is not about quantum crypto vulnerable to MITM but about physical attacks(attacks if your components are not perfects) which a completely different subject.