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How can #1 be false? No optical measurement can distinguish between good and evil photons. Eve can simply cut the cable, hook a pair of quantum machines up to t
by Daniel_Newby 13y ago
How can #1 be false? No optical measurement can distinguish between good and evil photons. Eve can simply cut the cable, hook a pair of quantum machines up to the ends, and proxy the data between Alice and Bob.
- anologwintermut 13y agoThere are information theoretically unbreakable message authentication codes[1] The main point of quantum crypto deployments (at least now) is to protect against future offline attacks (possibly using quantum computer). So in practice, I don't believe these authentication schemes are deployed. [1]https://wiki.cc.gatech.edu/theory/images/9/9e/Lec11.pdf https://wiki.cc.gatech.edu/theory/images/9/9e/Lec11.pdf