News · · 3 min
Iris at scale: inside UNHCR’s biometric identity system
The UN refugee agency’s tri-modal system — iris, fingerprint and face — had registered nearly 13 million displaced people by the end of 2023.
One of the clearest real-world uses of iris recognition isn’t at a border or a bank — it’s in humanitarian aid. UNHCR, the UN refugee agency, runs a Biometric Identity Management System (BIMS) that helps register and protect displaced people.
BIMS is tri-modal: for each person aged five and over it captures images of both irises, ten fingerprints and a facial photograph. Launched in 2015, it had enrolled almost 13 million individuals by the end of 2023 and is an integral part of registration data across more than 90 UNHCR country operations.
At this scale, the iris earns its place through one-to-many deduplication: checking each new enrollment against millions of existing records so a person is registered only once, which protects the integrity of aid distribution. NIST likewise notes that most flagship iris deployments run in identification mode — borders, corrections, traveler processing and deduplication.
The program also illustrates the responsibilities that come with biometrics at scale: consent, data protection, and careful governance of who can access the records and why.