Securing Model Context Protocol (MCP) Deployments Against Quantum Computing Risks

**Executive summary:** This blog-style advisory explains how MCP (Model Context Protocol) poses a high-value target for adversaries who may archive encrypted traffic now to decrypt later with a future quantum computer; it outlines the HNDL threat model and prescribes a three-phase quantum-safe roadmap—inventory, cryptographic agility, and hybrid key-exchange (e.g., X25519 + ML-KEM)—plus implementation notes and recommendations to adopt NIST-approved post-quantum algorithms and hybrid KEMs to protect long-lived AI context.