TPMShield: Interposeurs Chiffrés, Treillis de Silicium Actifs et Architecture Anti-Écoute

TPMShield fournit un chiffrement de bus au niveau du silicium, un accord dynamique de clés de session et des protections contre les interposeurs électriques pour empêcher le sondage physique et l'interception de signaux entre les puces TPM et le processeur hôte.

TPMShield Physical Bus Encryption & Interposer Defense Architecture

Encrypted SPI/I3C bus transceiver, session key establishment, and signal integrity monitor

Central System: Bus Crypto Guard - Encrypted SPI/I3C Engine

Cryptographic Nodes

  • Encrypted Transceiver
  • Session Ephemeral KEM
  • Signal Integrity Sensor
  • Command MAC Verifier
  • Glitch Detection Circuit

Architectural Layers & Protocols

  • Physical Interconnect Plane (High-Speed SPI / I3C / LPC Serial Bus): Operating up to 50 MHz serial clock rates with differential signaling and active shielding.
  • Hardware Bus Session Encryption (Authenticated AES-128-CCM / AES-GCM): Encrypting all commands, parameters, and sensitive return secrets (keys, PCRs) in transit.
  • Interposer & Probing Detection (Time-Domain Reflectometry & Capacitance Profiling): Detecting micro-probes, logic analyzer clips, or interposer flex circuits attached to bus traces.
  • Cryptographic Session Handshake (Ephemeral FIPS 203 ML-KEM-512 Key Agreement): Negotiating fresh session keys on every system reset and wake event to defeat replay attacks.

Key Metrics: 100% (Bus Traffic Encrypted) | < 40 ns (Transceiver Latency) | 0.1 pF (Interposer Detection Sensitivity) | Replay-Immune (Hardware Nonce Ratchet)

Protection contre l'interception physique de bus, sessions SPI/I3C chiffrées et atténuation des attaques par interposeur

Authoritative technical engineering reference for physical bus interception protection, encrypted spi/i3c sessions & interposer attack mitigation in NIST FIPS 203/204/205 standards, lattice-based cryptography, side-channel attack mitigation, and quantum-resilient infrastructure.

Core Engineering Areas

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