EU regulators warn of quantum threat to crypto security
6.7 Regulation EU regulators warn quantum computing could undermine blockchain security. Bitcoin and Ethereum are planning quantum-resistant upgrades as new research shows attacks may require fewer resources than thought.
European financial regulators have raised concerns that advances in quantum computing could threaten the cryptographic systems securing blockchains and digital financial infrastructure. In their Autumn 2026 risk assessments, the European Banking Authority, European Insurance and Occupational Pensions Authority, and European Securities and Markets Authority warned that quantum computing may undermine the mathematical frameworks protecting transactions, communications, and data storage. Recent research from Google Quantum AI indicates that the resources required to break widely used cryptography are significantly lower than previously estimated. While no quantum computer currently exists with the capability to compromise Bitcoin or Ethereum encryption, regulators are urging proactive preparation and migration planning. Bitcoin developers are considering a draft plan to phase out quantum-vulnerable signatures, and Ethereum aims to implement comprehensive quantum-resistant protections by December 2029. These warnings add urgency to the debate on post-quantum cryptography and highlight the need for readiness as quantum technology evolves.
