Privacy and security systems derived from cross-layer structure in 5G, Wi-Fi, voice agents, and satellite access. New: Mute the UE, a control-plane primitive for UE-initiated reachability muting.
MIRAGE (Mobility-Invariant RAN Attack-detection Guard Engine) separates real mobility from data-plane attacks using protocol structure rather than raw message counts. It turns cross-layer invariants into an attack classifier and mitigation selector.
Cipher shows that MAC randomization does not erase persistent cross layer signals. It fuses probe behavior, TLS fingerprints, and encrypted traffic statistics to quantify reidentification risk.
Cloak sketches privacy protection for direct to cell networks where public satellite trajectories make future cells predictable. It combines cohort handover, attach ambiguity, and timing advance quantization.
EARSHOT measures privacy leaks that happen inside the agent, not the acoustic signal. It combines voice privacy metrics with contextual integrity for assistants that remember, plan, and call tools.
ACI Guard models attacks where a spoken instruction enters through audio and leaks through a tool action. It evaluates contextual integrity gates for shared agentic voice assistants.