Digital identity assurance under NIST SP 800-63-3.

A two-page, auditor-ready guide for federal agencies, integrators, and regulated enterprises. Sourced against the NIST publications.

• The three assurance dimensions: IAL, AAL, and FAL, and where each is defined
• IAL1 vs IAL2 vs IAL3 at a glance, with proofing requirements and typical uses
• Why IAL3 cannot be met with a selfie-match app, and the requirements checklist
• Who needs IAL3, and what changes under SP 800-63-4

NextgenID runs the only Kantara-certified IAL3 identity proofing in the U.S., independently audited against NIST SP 800-63.