Comment Re:Quantum Bullshit (Score 3, Informative) 117
Sending out the spoofed message is trivial.
No it isn't. It's impossible to do it with better than 50% accuracy, which will make the man-in-the-middle very, very detectable. None of the useful information is ever sent using quantum bits, it's only one-time-pad style key. If a man-in-the-middle is detected, the key is not used and no secure information is breached. I mentioned it in an above post, but the best that a "hacker" could ever do is get a few random bits of information out of every hundred, even with this attack. That isn't enough information about the key to extract any information about the message.
Alice and Bob compare measurement results before send the message. There is theoretically no way to intercept and resend bits or eavesdrop without introducing errors.