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Fibre Lasers

Keeping cryptographic keys safe

Turning an optical fibre into a giant laser may allow for practical key generation without requiring fragile quantum states.

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Figure 1: Mirrors representing '0' or '1' (Mo or M1; Mr is a reset mirror) are randomly chosen by Alice and Bob.


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Kanter, G., Kumar, P. Keeping cryptographic keys safe. Nature Photon 1, 15–16 (2007).

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