Post-Quantum Cryptographic Agility in Model Context Protocol Proxies

This blog post warns that current cryptographic protections for MCP proxies and AI context data may be vulnerable to future quantum decryption and advocates implementing cryptographic agility—including hybrid classical/post-quantum handshakes (e.g., RSA + ML-KEM), algorithm negotiation, zero-downtime rotations, quantum-resistant P2P tunnels, identity via quantum-safe signatures, and policy enforcement—to protect long-lived sensitive context and enable compliance and auditability.