Guardians of the State: An Air-Gapped AI Fortress for Consumer Data — Rachna Srivastava, DFPI

The description of this talk about California's financial-fraud system presents a physical way to restrict data movement: an optical transmitter sits outside the protected environment, while a receiver sits inside, with no transmitter sending in the reverse direction.

In that account, information can enter through the link without creating an outward communication path through the same connection. The team uses this hardware arrangement to avoid depending on a firewall setting for that boundary. Its claimed protection concerns this particular link; establishing the security of the whole system would require examining its other connections and operating procedures.