Circle Releases Post-Quantum Security Whitepaper, Plans to Support Post-Quantum Signatures at Arc Mainnet Launch

Circle has released a "Post-Quantum Security Whitepaper," proposing a phased post-quantum resilience roadmap centered on the long-term security of the Arc blockchain ecosystem.The roadmap covers multiple technical areas, including quantum-safe signatures, private execution environments, validator hardening, infrastructure migration, and account recovery, applicable to core components such as the Arc network, USDC, smart contracts, and validators.Circle stated that it plans to provide post-quantum signature support at the launch of the Arc mainnet (2026) to enhance the ecosystem's ability to withstand future quantum computing threats.