At checkpoint identity verification, TSA uses Credential Authentication Technology (CAT-2), which provides: * One-to-one biometric matching: comparing the passport or government ID photo to the traveler in front of the officer. * Verification of the document’s authenticity (security features, cryptographic encoding), plus biometric confirmation—all completed in fractions of a second. Testing by TSA and NIST reports show >99% accuracy rates and false positives under 0.001%. In this mode—now nearly universal across domestic checkpoints—the system is highly reliable, fast, and operationally efficient.