AETERNA Hardware Blueprint v1.2 — Experimental Call for Takeover and Replication

AETERNA is an open‑hardware blueprint and dataset for a post‑classical, physically robust cold‑storage architecture based on electron‑beam induced densification in synthetic diamond crystals (Δn phase objects). The design targets multi‑millennial archival of cryptographic keys, state records, and foundational knowledge by combining high‑density Gaussian electron‑beam writing (EBL), a fully passive hermetic titanium/PFPE cartridge, and Quantitative Phase Fourier Ptychographic Microscopy (QP‑FPM) readout. This release includes: complete technical specifications and hardware topology; Geant4 Monte Carlo simulations; thermal analysis and postprocessing scripts (Numba/Python); forward‑model and reconstruction code for QP‑FPM; a detailed experimental validation plan and prioritized takeover tasks. Status: experimental — published as an open call for independent experimental takeover and replication by the DeSci and engineering community. Author: Milenko Savić (ORCID: 0009‑0004‑0898‑6414). Licenses: documentation (CC BY 4.0); software (MIT); hardware designs (CERN‑OHL‑S v2). How to engage: contact the author via the repository contact details.