How Meta enforces purpose limitation via Privacy Aware Infrastructure at scale

What this post added

Introduced Policy Zones as an Information Flow Control (IFC) based technology to enforce purpose limitation at scale. Policy Zones encapsulates, evaluates, and propagates privacy constraints for data in transit and at rest, integrating with systems like HHVM, Presto, and Spark. It enables granular, real-time control over data flows by annotating data assets and enforcing rules based on context, moving beyond traditional point-checking and data lineage methods. The Privacy Aware Infrastructure (PAI) initiative expands on this by embedding first-class privacy support into Meta's infrastructure.