Beyond Traditional Defense: Why AI Systems Need Quantum-Proof Cryptography Now

**Executive summary:** This blog post warns that long-lived AI agent sessions and the Model Context Protocol are vulnerable to 'Store Now, Decrypt Later' attacks as quantum computing matures, and it recommends adopting NIST post-quantum cryptography standards (ML-KEM, ML-DSA, SLH-DSA), hybrid encryption, cryptographic agility, and a three-step roadmap—discovery of shadow AI, hybrid integration, and runtime governance—to harden AI infrastructures.