If all else fails, banks can generate terabytes of random one-time pad bytes, an... | Hacker News

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		wcoenen 4 months ago \| parent \| context \| favorite \| on: Willow quantum chip demonstrates verifiable quantu... If all else fails, banks can generate terabytes of random one-time pad bytes, and then physically transport those on tape to other banks to set up provably secure communication channels that still go over the internet. It would be a pain to manage but it would be safe from quantum computing.

SAI_Peregrinus 4 months ago [–]

They could also use pre-shared keys with symmetric cryptography. AES-256-GCM is secure against quantum attack, no need to bother with one-time pads.

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