Mnemosyne: Physical security for digital sovereignty. Thermodynamic lower bound (10^38 J, kappa >= 804 bits) derived from Landauer's Principle. Shifting security from math to physics.

BFT-MESI: Byzantine-resilient cache coherence for 2GB RAM nodes. Formally verified in TLA+.

Full manuscript: https://www.researchgate.net/profile/Bo-Jun-Han

Open to: - PhD positions (Systems/Security, funding required). - RAG & System architecture consulting.

Contact: rosta@rosta.llc