Hybrid Ratchet Protocol implements a four-phase state machine combining symmetric and asymmetric cryptography for forward secrecy. Registration and Key Publication establishes initial credentials, followed by Hybrid Session Establishment that negotiates shared secrets, then enters an Iterative Model Training Loop for continuous key derivation. Post-Compromise Asymmetric Ratchet activates upon compromise detection, feeding back to retraining to restore security without session termination. This architecture demonstrates how hybrid protocols achieve both efficiency and resilience against key compromise.