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First demonstration of quantum teleportation over busy Internet cables
(news.northwestern.edu)
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this post was submitted on 22 Dec 2024
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M cannot replicate the particle after they read it, so A and B will detect M's attempt when they compare results.
The same as classical one-way encryption, it only works through authenticated channel tho. It's not magic, you have to have some kind of pre-existing secret or rely on third-party authentication