- John Martinis warns that quantum tech could one day break Bitcoin’s encryption in minutes.
- Advances in qubit efficiency suggest quantum threats may arrive sooner than markets expect.
- Experts urge caution, warning that rushed fixes could weaken Bitcoin more than quantum risks.
Bitcoin and other cryptocurrencies face a potential threat from quantum computers, warns John Martinis, 2025 Nobel laureate in Physics. Martinis, who led Google’s quantum hardware program, said a sufficiently advanced quantum computer could crack Bitcoin’s encryption in minutes.
“It’s not something that has zero probability; people have to deal with this,” he stressed in a recent interview. Martinis said that cracking encryption is one of the easier tasks for quantum computers because it relies on straightforward number-based calculations.
He pointed to Bitcoin as an early target since its decentralized system makes upgrades slow and complicated. Still, he added, building a quantum computer powerful enough to pull off such an attack remains extremely difficult today.
Quantum Threats and Industry Preparations
Grayscale and other crypto companies are pushing to prepare faster as quantum technology advances. Research shows breakthroughs could happen suddenly, leaving little time to respond.
Peter Shor’s work has already shown that quantum machines could potentially break current encryption. Experts now say just 1,200 to 1,450 logical qubits might be enough to challenge today’s systems, a number closer than once expected.
Researchers at Caltech, working with Oratomic, said that a working quantum computer could require only 10,000 to 20,000 qubits, far fewer than the millions previously thought necessary.
“The need for fewer qubits means quantum computers could, in theory, be ready by the end of the decade,” Caltech said. As a result, blockchain networks, which depend on slow, consensus-based upgrades, might struggle to defend themselves in time.
Risks of Rushed Quantum Fixes
Despite the urgency, experts caution against hastily implementing post-quantum solutions. Bitcoin evangelist Samson Mow cautioned that any rushed solutions might introduce vulnerabilities, impede the system’s performance, and lead to interoperability issues.
As he explained, “In other words: Make Bitcoin quantum-proof only for it to be owned by regular computers.” While Coinbase executives have called for urgent measures, a strategic approach is necessary to ensure no additional vulnerabilities arise in the process.
Related: Quantum Risk Debate Returns as Crypto Readiness Divides Analysts
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