✉news BusinessCrypto first seen 6 h ago, last 1 h ago, peak #3
Bitcoin Quantum Attack Estimate Halved to 1,151 Qubits
Original: Bitcoin Quantum Attack Cost Halved to 1,151 Qubits [2026]
New research suggests breaking Bitcoin's cryptography could require as few as 1,151 logical qubits, roughly half the previously estimated cost of a quantum attack. The revised figure intensifies debate over how soon quantum computers could threaten Bitcoin's elliptic curve signatures and whether the network should migrate to quantum-resistant cryptography before it is too late.
Why now: Fresh estimates that quantum attacks on Bitcoin are cheaper than assumed reignite concerns about the cryptocurrency's long-term security.
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Evidence
- Bitcoin Quantum Attack Cost Halved to 1,151 Qubits [2026] · shattered.io
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