NIST SP 800-63-3

Full Title

Digital Identity Guidelines

Context

• Specifically applies to federal agencies implementing digital identity services but is widely used internationally.
• This third version makes substantial changes to the second version, specifically the single list of the levels of authentication has been separated into three distinct lists, one for each of the documents as described below.

Enrollment and Identity Proofing (800-63-3A)

• Contains IAL levels = Identity Assurance Level

Authentication and Lifecycle Management (800-63-3B)

• Contains AAL levels = Authentication Assurance Level

Federation and Assertions (800-63-3D)

• Contains FAL levels = Federation Assurance Level

References

https://pages.nist.gov/800-63-3/