TPMVault: 抗量子机密数据硬件封印、单调防固件降级保护与 NVRAM 权限控制

TPMVault Hardware Sealed Storage & Policy Execution Pipeline

NVRAM access controller, policy authorization tree, and post-quantum unseal engine

Central System: TPM Vault Controller - Policy-Authorized NVRAM

Cryptographic Nodes

• Secure NVRAM Array
• Policy Tree Evaluator
• PCR State Comparator
• Decapsulation Unseal Core
• Hardware Audit Logger

Architectural Layers & Protocols

• Secure NVRAM Silicon Plane (Silicon-Oxide-Nitride-Oxide-Silicon (SONOS) Flash): Providing 256 KB of hardware-encrypted, wear-leveled non-volatile storage isolated from host OS.
• Complex Authorization Policy Trees (TPM2_PolicyOR / TPM2_PolicyAuthorize): Enforcing multi-condition authorization logic: PCR match AND user biometric AND time-lock.
• Post-Quantum Key Unwrapping (FIPS 203 ML-KEM Key Encapsulation Mechanism): Decrypting sealed enterprise secrets using hardware-bound private keys only when policies pass.
• Tamper-Evident Access Auditing (Hardware Monotonic Counters & Audit Logs): Incrementing non-resettable counters on every unseal attempt to detect brute-force tampering.

Key Metrics: 256 KB (Hardware NVRAM Capacity) | < 12 ms (Policy Evaluation Time) | SONOS (Tamper-Resistant Storage) | Zero-Leak (Memory Remanence Defense)