Quantum cryptography

How quantum technologies enable uncrackably secure communication.

In our modern computer world, being able to encrypt messages is not only necessary to keep some information secret from others, but is a key part of technologies such as cryptocurrencies like Bitcoin. Furthermore, the scandals around widespread eavesdropping of intelligence agencies has shown the world that in fact none of the routines used today are really secure. But what if I told you that in ten years all communication will be secure because it is physically  impossible to eavesdrop on communication encrypted by quantum cryptography?

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