A new research paper from Caltech and quantum computing startup Oratomic concludes that the cryptographic protections securing Bitcoin and Ether wallets could be compromised using far fewer quantum computing resources than previously believed. Earlier estimates had placed the threshold at hundreds of thousands of physical qubits, but the study suggests the barrier may be as low as 10,000. The findings represent a significant shift in how the industry understands the quantum threat to blockchain security.
Using Google‘s quantum circuits as a reference point, the authors calculate that a neutral-atom quantum computer equipped with approximately 26,000 qubits could break ECC-256, the elliptic curve cryptography standard that underpins major blockchain networks. Under this scenario, such an attack could be completed in roughly ten days. The same research estimates that cracking RSA-2048, a widely used encryption standard, would require around 102,000 qubits and approximately three months of processing time.
The paper draws attention to the narrowing gap between current quantum hardware capabilities and the threshold needed to threaten real-world cryptographic systems. As quantum computers continue to advance, the cost and complexity of mounting such attacks are expected to decrease. This trajectory raises urgent questions about the readiness of the cryptocurrency industry to respond.
The central concern highlighted by the research is whether blockchain networks and their users can transition to quantum-resistant cryptographic systems before quantum hardware becomes capable enough to exploit existing vulnerabilities. Such a migration would require coordinated action across developers, exchanges, wallet providers, and individual users. The window for an orderly transition may be narrowing faster than the industry had anticipated.
The authors acknowledge that the paper carries conflicts of interest, given that several of them are affiliated with Oratomic, a company with a commercial stake in the quantum computing sector. This disclosure has prompted some observers to weigh the findings with caution, though the underlying technical analysis references established quantum circuit benchmarks. Independent review of the methodology will likely be necessary before the conclusions are widely accepted.
The study adds to a growing body of research urging the cryptography and blockchain communities to accelerate work on post-quantum security standards. Regulatory bodies and standards organizations in various countries have already begun developing quantum-resistant alternatives, though widespread adoption remains limited. The pace of that adoption may need to increase significantly in light of findings such as these.
Originally reported by CoinDesk.
