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May 21, 2026
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Is there a fallback plan if bitcoin’s underlying cryptography is cracked?

Lets say someone started making real viable quantum computers that were affordable enough that large companies could buy one. And lets say a quantum algorithm was devised to crack the private keys of Bitcoin public keys in days rather than years.

Is there a plan for that possibility? What would happen? Would there be a smooth migration to another system? Would bitcoin be able to update somehow to protect itself from such a breach?

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