Which biometric uses vein patterns for identification?

• A. Iris Recognition
• B. Gait Recognition
• C. Vein Matching
• D. Sniff Test

Answer: (C)

Vein patterns as a biometric rely on the unique network of subcutaneous veins, typically captured with near-infrared imaging. This internal vascular layout is highly individual, stable over time, and difficult to spoof because you’d have to replicate someone’s actual blood vessel structure. The imaging highlights the vein paths beneath the skin, creating a distinctive pattern that can be stored as a template and matched to identify or verify a person.

This approach is different from iris recognition, which uses the visible pattern of the iris around the pupil, or gait recognition, which analyzes how a person walks. The sniff test isn’t a real biometric method. So the option that uses vein patterns for identification is vein matching.