Guides
The standards behind identity verification, explained.
How the formats and algorithms KYCVerify implements actually work, and what they can and cannot prove.
All guides
- Documents · MRZ check digits, explainedHow the 7-3-1 algorithm in ICAO Doc 9303 works, worked through on the specimen passport, and what it can and cannot prove.
- India · Aadhaar Secure QR and Offline e-KYC, explainedWhat the two UIDAI-signed offline artefacts contain, how their signatures are verified, and how to handle them without storing Aadhaar numbers.
- Biometrics · Active versus passive livenessWhat challenge-response liveness checks, what passive and certified PAD add, and how to choose honestly for your risk.
- Biometrics · Face match: embeddings, similarity and thresholdsHow a selfie is compared with a document portrait, what the similarity score means, and how to set the pass and review thresholds.
- Risk · Sanctions screening: lists, fuzzy names and false positivesWhere the OFAC and UN lists come from, how names are normalised and scored, why a hit never declines a session on its own, and what screening does not cover.
- Developers · Verifying webhook signaturesWhy KYCVerify signs a timestamp with the body, how to verify it correctly in Node.js, Python, Go, Rust and PHP, and the mistakes that break it.
