P ≠ NP encryption relies upon the solution to a mathematical problem being easier to verify than to... solve in the first place. The classic public/private key methods assumed classic computers. Quantum computers are coming. Sensitive communications need quantum encryption to flummox quantum hackers.
The story goes that quantum keys will be safe to distribute over the wire (UPDATE 8/19 or in space) but as for the devices... well, that's the devices' problem(s). More exactly it's your problem if you've bought Huawei equipment.
A week ago we got an article about device-independent quantum key distribution. This assures that Winnie the Pooh can no longer steal your encryption. From theory to experiment in three decades so maybe we'll start seeing this in 2050.
Which puts the focus back into the algorithms.
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