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There are information theoretically unbreakable message authentication codes[1] The main point of quantum crypto deployments (at least now) is to protect again
by anologwintermut 13y ago
There 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