Identity deduplication
Also known as: Biometric deduplication · 1:N · Face search · Dedupe · Duplicate enrollment check
Checking whether a face already exists in the database before accepting a new enrollment, searching it against every record (1:N) to stop the same person from enrolling several times under different identities.
Legal basis
NIST FRVT 1:N — Face Recognition Identification
Identity verification is 1:1 — this face matches this document. Deduplication is 1:N — does this face already appear in any existing record? It is the difference between confirming who a person claims to be and discovering they have been in before, under another name. The algorithms that run this search are the same ones measured in NIST FRVT (1:N) identification testing.
It is the control against multiplicity abuse: a fraudster opening dozens of accounts to farm bonuses, one face behind several Social Security numbers, a synthetic identity reused. Combined with the relationship graph, biometric deduplication stops looking at the record in isolation and starts seeing the network of accounts that share the same face.
Frequently asked questions
What is biometric deduplication (1:N)?
It is searching a face against every record in a database (1:N) to find out whether that person already has an enrollment before accepting a new one. It stops the same person from enrolling several times under different identities.