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A comment on Two atomic clocks have been quantum entangled for the first time. Parent comment

Re:Two atomic clocks have been quantum entangled for the fir... by fsh on Saturday September 10, 2022 @04:31AM (#32788893)
This is incorrect. Quantum key distribution ("quantum cryptography" is a misnomer) is vulnerable to man-in-the-middle attacks. Security relies on having a pre-shared key which makes it essentially useless in practice (just use AES if you have a PSK).
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Re:Two atomic clocks have been quantum entangled for the fir... by willis936 on Saturday September 10, 2022 @06:20AM (#32789317)
AES 256 only requires millions of qubits to crack. What do we do once we think that's attainable behind close doors? It'd be better to be prepared.

https://www.fierceelectronics.com/electronics/aes-256-joins-...

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Re:Two atomic clocks have been quantum entangled for the fir... by fsh on Saturday September 10, 2022 @07:30AM (#32789674)
This is a wildly optimistic estimate. Even if we had an error corrected quantum computer that could evaluate an AES key (complete science fiction for the forseeable future), running Grover's algorithm would take millenia assuming extremely fast gate times (1 ps).

In any case, doubling the key length would be infinitely simpler than using QKD.

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