The European Union has introduced a roadmap requiring all 27 member states to initiate a transition to post-quantum cryptography. Planning for this migration must be completed by December 31, 2026.
The initiative addresses the threat of Q-Day, when quantum computers could break asymmetric encryption. Estimates suggest that viable quantum attacks could emerge as early as 2029, potentially enabling the decryption of data harvested today.
The migration schedule mandates that high-risk infrastructure, including energy grids and financial networks, must transition to quantum-resistant systems by the end of 2030. A full conversion of broader systems is targeted for 2035.
The EU has invested over €11 billion in quantum technologies. The roadmap aligns with post-quantum cryptographic standards finalized by NIST in 2024. Currently, no major Layer 1 blockchain networks have implemented quantum-resistant protocols.
Blockchain networks are particularly vulnerable due to the permanent nature of public ledgers. Transactions containing exposed public keys could be susceptible to future decryption, as quantum machines could theoretically derive private keys from them.
