Why Your AI Intrusion Detection System Needs Quantum-Proof Cryptography Now

**Executive Summary:** This advisory warns that adversaries are already archiving encrypted AI-related traffic to decrypt later with future quantum computers (the HNDL threat), putting model weights, training data and update integrity at risk; it describes quantum forgery and MitM risks against AI agent protocols, and recommends immediate steps—inventory, assessment, PQC pilots, and governance—plus hybrid classical+PQC handshakes and cryptographic agility to mitigate the risk.