Engineering ultra-compact post-quantum key agreement protocols tailored specifically for low-bandwidth chip-to-chip interfaces.
Serial buses cannot afford heavy handshake protocols. We detail an optimized, pre-shared public key ML-KEM-512 handshake that establishes fresh 256-bit symmetric bus keys in under 120 microseconds, consuming less than 2 KB of bus data transmission.
To prevent long-term session key compromise, TPMShield implements continuous symmetric ratcheting: session keys are automatically evolved every 10,000 bus transactions using hardware HMAC-SHA256 operations, guaranteeing forward secrecy across extended system uptimes.
Extending the zero-trust paradigm down to the silicon trace level: treating motherboard traces as untrusted public networks and enforcing cryptographic verification across every inter-component boundary.