Plain-language guides to NIST SP 800-63-4 identity assurance and what FedRAMP High asks of identity proofing.
Identity Assurance Level 3 under SP 800-63-4: what it requires, how it differs from IAL2, and why it can't run on an applicant's own device.
Every IAL3 control, one by one, and the questions to ask a provider about each.
Where FedRAMP High (Class D) asks for IAL3, and what an assessor looks for.