In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Electronegativity wrote:

This is way off topic, but since you mentioned cryptography and random numbers I think it might be possible to build an unbreakable encryption sheme based on Bell's theorum.

The short story is that if you generate two simultaneous photons from the same source they will have the same phase at a later time regardless of the paths traveled.  The phase of a photon can be rendered completely random by repeated scattering events.

Here's the encryption scheme:

A central source generates two phase-entangled photons and sends one to each of our computers down their respective optical cables. The phase of the photons are randomized by scattering in the cable, but are measured to be the same by ploarizers at the point where the photons reach our computers.

We use the phase of the photon as an encryption key.

This effectively creates 2 identical private keys for RSA encryption without the need of a public key, and nothing, not even the source that generated the photons, could predict what the phase would be at the time of measurement.

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