Side-Channel Attack Mitigation for Quantum-Resistant MCP Metadata

**Executive summary:** The report warns that post-quantum cryptography and AI models remain vulnerable to practical side-channel attacks—such as Hertzbleed and EM-based attacks like BarraCUDA—that can leak secret keys and model/session metadata from GPUs and AI accelerators; it highlights affected algorithms (Kyber, Dilithium), attack vectors (DVFS/timing, EM pulses, 1-trace horizontal attacks), real-world demonstrations on devices like Cortex-M4 and Nvidia Jetson, and recommends mitigations including masking, data-independent execution, noise injection, TVLA testing, and certification.