Understanding Identity Assurance Levels (LoA 1-4)

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Identity assurance levels (LoA), a framework associated with NIST, measure confidence that a digital user is who they claim to be and help organizations select verification procedures based on transaction risk, KYC requirements, and sensitivity of accessed services. LoA 1 relies on knowledge-based questions and is intended for low-risk uses but is vulnerable to social engineering, while LoA 2 adds a possession factor such as an email or phone one-time passcode for stronger protection. LoA 3 combines credentials with biometric factors such as facial recognition, fingerprints, or voice recognition for higher-risk financial and government applications, and LoA 4 further requires a registered trusted device, making it suitable for highly sensitive or regulated transactions. Higher assurance levels generally require more extensive technology, integration, and maintenance, and Didit promotes its modular platform as a way to combine email, phone, biometric, liveness, device-fingerprinting, risk-scoring, workflow, and analytics capabilities to create customized verification flows.

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