PANews reported on April 6th that, according to Theblock, Circle officially announced that its upcoming Layer 1 public chain, Arc, will natively support post-quantum signature algorithms. Users can create quantum-resistant wallets, which will be optional rather than mandatory. Circle warned that Q-Day may arrive before 2030, and attackers are already stealing encrypted data in advance. Long-term quantum resistance is a baseline requirement for institutions.

Arc is EVM compatible, with its testnet launched in October 2025 and the mainnet expected to launch in the second half of 2026. In the medium to long term, it will extend its quantum resistance capabilities to the entire stack, including privacy data and validator nodes. Circle stated that post-quantum migration to public chains such as Bitcoin may take several months, and delays will lead to the risk of hasty upgrades. Arc aims to provide a non-disruptive, practical migration solution.