EU Watchdogs Put Quantum Risk on the Radar Europe's three top financial supervisors have placed quantum computing firmly on their risk agenda, warning that advances in the technology could ev
Europe's three top financial supervisors have placed quantum computing firmly on their risk agenda, warning that advances in the technology could eventually compromise the cryptographic systems that underpin blockchain networks. The European Banking Authority (EBA), EIOPA, and ESMA identified emerging technologies alongside external dependencies and private credit as key vulnerabilities for the EU financial system in their Autumn 2026 risk update.
In their joint update, the authorities stated that advances in quantum computing could undermine the cryptographic systems that secure blockchain transactions, communications, and databases. The warning extends beyond crypto: the authorities noted quantum computing could also transform financial processes including fraud monitoring, compliance, and pricing.
The regulators' concern is backed by a notable shift in the research landscape. At issue is elliptic curve cryptography (ECC), the mathematical system that secures $BTC, $ETH, and most other blockchains. Most wallets and transactions rely on it to verify ownership and authorize transfers.
Google Quantum AI's research represents an approximately 20-fold reduction in the number of physical qubits required to solve the elliptic curve discrete logarithm problem underpinning these systems.The team compiled quantum circuits implementing Shor's algorithm using fewer than 1,200 logical qubits, estimating execution on a superconducting qubit machine with fewer than 500,000 physical qubits in a matter of minutes.
Critically, the threat remains theoretical for now. No computer currently exists capable of executing such an attack. But the direction of travel is clear: advances in algorithms and design are steadily lowering the bar for quantum attacks, even before large-scale hardware exists.
The blockchain industry is not waiting passively. Bitcoin developer Jameson Lopp and five co-developers proposed in February to phase out the network's current signature schemes and restrict spending of unmigrated funds, while the Ethereum Foundation aims to make Ethereum quantum-resistant across its layers by December 2029. Google's own research team has called on the cryptocurrency community to begin transitioning blockchains to post-quantum cryptography, which is resistant to quantum attacks.
For regulators and developers alike, the message is consistent: the window to prepare is open, but it may not stay that way indefinitely.
Sources:ESMA: ESAs call for vigilance over external dependencies, cyber threats and private credit risksGoogle Research: Safeguarding cryptocurrency by disclosing quantum vulnerabilities responsiblySecurityWeek: Google Slashes Quantum Resource Requirements for Breaking Cryptocurrency Encryption
