Arc has announced a comprehensive roadmap to integrate post-quantum security into its blockchain infrastructure, addressing potential quantum threats anticipated by 2030. The plan, outlined by Circle and CEO Jeremy Allaire, begins with enhancing wallet security and gradually extends to full infrastructure protection. This phased approach aims to mitigate risks such as "harvest now, decrypt later" attacks, where encrypted data is collected now and decrypted once quantum computing becomes viable. The roadmap introduces post-quantum protections starting with wallet signatures at the mainnet launch, allowing users to create quantum-resistant wallets without immediate system-wide migration. Subsequent phases will focus on securing confidential transactions and sensitive data, followed by infrastructure upgrades including access controls and cryptographic tools. These measures are designed to protect long-term confidentiality and align with protocols like TLS 1.3. Migration challenges, such as increased signature sizes and higher costs, necessitate early action. Coordinated upgrades across wallets, validators, and smart contracts are essential to ensure seamless transitions. Arc's final phase will enhance validator authentication and network consensus, maintaining performance while integrating post-quantum features. The roadmap provides a structured path for institutions to achieve quantum-resistant infrastructure while remaining EVM-compatible.