Bitcoin Security Under Threat: Former Mt. Gox CEO Warns of Quantum Upgrade Nightmare
ByAinvest
Sunday, Feb 22, 2026 7:09 am ET1min read
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Former Mt. Gox CEO Mark Karpelès warns that upgrading the entire Bitcoin supply to a quantum-resistant standard will take years and be virtually impossible. The real target is ECDSA, the digital signatures used for transactions, which are susceptible to quantum attacks. Karpelès emphasizes the logistical nightmare of getting every user to upgrade, as owners of lost or dormant coins cannot move them to quantum-safe addresses.
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