Modern research infrastructures increasingly span heterogeneous environments, including cloud computing, high-performance computing (HPC), edge computing nodes, and most recently quantum computers (QC). This diversity challenges traditional perimeter-based security models and demands more agile, robust cybersecurity solutions. In response, we present a minimal yet comprehensive cybersecurity architecture built around Zero Trust principles and darknet-inspired principles. Our solution adopts a deployment-agnostic approach, abstracting away environmental differences through encrypted overlay networks and identity-driven authentication and authorization mechanisms.