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Pass the hash for peace, love and security in the quantum computing age

Lee D Silver badge

The problem is that they are two different parts of quantum mechanics.

Though building a quantum machine might require entanglement in part, only a relatively tiny one, in a massive lab dedicated to it, is necessary to solve any prime factorisation problem thrown at it - basically as fast as you CAN throw them at it.

Whereas quantum entanglement as security requires fibre optic connections - at the very least - and actual transmission and reception of quantum entangled photons between the sender and recipient in order to work.

They are entirely different practical problems and having one does not automatically give you the other.

Thus, the need for "quantum-proof" encryption will arrive long before you're connected by direct, unamplified, unrepeated, fibre-optic connection to every website you want to communicate with securely.

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