“Quantum Mechanics: The Physics of the Microscopic World” S:1 E:20 Quantum Cryptography

S:1 E:20 Quantum Cryptography The uncopyability of quantum information raises the possibility of quantum cryptography – an absolutely secure method for transmitting a coded message. This lecture tells how to do it, noting that a handful of banks and government agencies already use quantum cryptography to ensure the security of their most secret data.