Privacy, Identity & Compliance Infrastructure

Privacy is not a side quest for digital assets; it is a prerequisite for institutional, consumer, and enterprise adoption. Castle Labs maps the full stack: privacy chains, Ethereum privacy systems, privacy-first L2s, FHE, MPC, TEEs, private compute, identity, and selective-disclosure systems. The core reader problem is clear: how can users and institutions keep sensitive information private while still proving what regulators, counterparties, and applications need to know?