Comment on IBM releases first-ever 1,000-qubit quantum chip

not_woody_shaw@lemmy.world ⁨1⁩ ⁨year⁩ ago

• echo64@lemmy.world ⁨1⁩ ⁨year⁩ ago

  It takes about a billion qbits to break 2048bit encryption, so a while.

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  • Overzeetop@sopuli.xyz ⁨1⁩ ⁨year⁩ ago

    More importantly, how long until I can guarantee a 51% chance of solving every bitcoin block?

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    • cyd@lemmy.world ⁨1⁩ ⁨year⁩ ago

      Hash functions are not known to be quantum vulnerable (i.e., there’s no known quantum algorithm that provides an exponential speedup, best you can do is to use Grover’s algorithm to slightly speed up the brute force search). So maybe never.

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      • threelonmusketeers@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

        Hash functions are not known to be quantum vulnerable

        So why don’t we use these functions for regular encryption? Or do we?

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  • frezik@midwest.social ⁨1⁩ ⁨year⁩ ago

    IIRC, those several million qubit computers out there right now aren’t really comparable, either. They’re using a ton of qubits, expecting a lot of them to fall out of superposition, but hoping they have enough to get a useful result. IBM’s approach is to try to get the most out of every qubit. Either approach is valid, but IBM’s 1000 qubits can’t be directly compared to millions of qubits used elsewhere.

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• LastoftheDinosaurs@lemmy.world ⁨1⁩ ⁨year⁩ ago

  [deleted]

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  • 4am@lemm.ee ⁨1⁩ ⁨year⁩ ago

    CA doesn’t have your private key

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