1. (Difficult): The whole quantum mechanics idea makes sense, but I can't explicitly explain it. It just kind of intuitively makes sense. So reading a photon changes the photon? So why do observed horizontal photons stay horizontal and vertical photons change?
Also, when Eve eavesdrops Bob will be wrong 25% of the time EVEN IF HE USES THE CORRECT BASES, correct? So really he has a 3/8 chance of getting the right bit while without Eve's eavesdropping he has 1/2 chance of getting the right bit. Correct?
2. (Reflection): I never would have thought of using quantum mechanics in cryptography!
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