INTERCONNECT LAYERS 1–2 POLICY ENFORCEMENT POINT // NIST SP 800-207 • SP 800-193 • NSA RAIN

Hardware Zero-Trust Crosswalk & Autonomous Agent Containment (SKILL.md → BAR0)

Conventional Zero Trust (OSI Layers 3–7) trusts the host kernel, hypervisor, and CXL fabric manager once attached. Spectral Flit-Filter enforces non-bypassable (RAIN) capability projection directly on 512-bit CXL/UCIe flit wires at 250 MHz–693 MHz while spectralc gates cluster policy updates in 1.36 ms.

01. Seven-Pillar Federal Zero-Trust Hardware Mapping

Zero-Trust / RAIN Pillar	Layer-1/2 Threat Vector	Physical Silicon Enforcement (128B BAR0 / RTL)	Formal Proof Gate
1. Tenant Identity	Forged SPID=0, modulo-64 aliasing, or null vector	Write-once port prefix CSR 0x78[7:0] + 64-tenant bitmap CSR 0x70	SVA 6; Lean 4 thm03, thm16
2. Endpoint Resiliency	Compromised DMA replaying OOO cacheline beats	4-channel 64-cacheline OOO DMA ratchet + Mode-C.2 write auto-lockout	SVA 7; Lean 4 thm11, thm14
3. Micro-Segmentation	Cyclic Confused-Deputy laundering (β₁ > 0) & cable cuts	Anti-hairpinning, S₆₄ orbit chord clamp, <4 ns PHY-gated (T₀,T₁) failover	SVA 2, 3; Lean 4 thm21, thm28
4. Agent Containment	Rogue AI agent exceeding TTL or holding dirty cachelines	spectralc compiler, 64-bucket time-wheel (CSR 0x68), DirtyEvict bypass	SVA 4, 10; Lean 4 thm25, thm26
5. Model Weight Guard	Shared-HBM weight theft or Bank-0 timing side channels	Stage-2 fractured LUT6_2 4-tier BF16 clamp + 341-LUT Per-ARID scrub shim	SVA 8, 9; Lean 4 thm22, thm27
6. Audit & Provenance	Unverifiable derivation egress or silent policy violations	Sticky-lockout digest CSR 0x58 (I ≤ log₂(M+1)) + CSR 0x48 tamper counter	SVA 5; Lean 4 thm04, thm09
7. Non-Bypassable Ratchet	Compromised OS issuing 0→1 MMIO writes or warm FLR	Cold-POR AND2 hardware ratchet + Vieta GF(256)[Z] ideal + FIPS-204 ML-DSA-87	SVA 1; Lean 4 thm02, thm20