Quantum Cryptography is the process of encrypting information with polarised photons. This makes a theoretically and practically unbreakable code that would ensure good communication forever. You can run the photons by fibre optic cables but not in the air because the signal dissipates. The point is that we can do it right now, but there is no need to because our current assymetric RSA ciphers would take the NSA about 500 billions years to decipher. I have no contention, i just think this is cool. The ultimate achievement would be to invent a quantum computer that could break an RSA cipher instaneously due to superposition. however then we could just use the quantum cipher. Any Questions?