Building Privacy-Preserving Decentralized Identity on Midnight

This isn't another high-level overview you'll forget in a week. This is a complete,technical deep-dive I wish I had when I started building on Midnight three weeks ago. I've spent countless nights debugging witnesses, fighting with PK derivation mismatches, and discovering exactly what works and what doesn't. By the time you finish this guide, you'll have a complete, tested, DID + Verifiable Credentials system that actually runs today on Midnight Preview. Why This Actually Matters KYC/AML checks. Age verification. Accredited investor authentication. Voting eligibility. Healthcare access control. These aren't optional features they're regulatory requirements for any serious DeFi, enterprise, or consumer app in 2026. Here's the problem: Traditional centralized systems = complete data leakage to issuers and verifiers Public blockchains = every claim is permanently visible to the entire world "Privacy-focused" solutions = still require off-chain oracles or expose too much metadata Midnight