Digital Identity Guidelines
This revision of NIST SP 800-63 has been superseded by NIST SP 800-63-4 as of August 1, 2025. Please refer to those documents for the current guidelines.
The four-volume SP 800-63 Digital Identity Guidelines document suite is available in both PDF format and online.
PDF versions of the documents are available from:
| Document | Title | URL |
|---|---|---|
| SP 800-63-3 | Digital Identity Guidelines | https://doi.org/10.6028/NIST.SP.800-63-3 |
| SP 800-63A | Enrollment and Identity Proofing | https://doi.org/10.6028/NIST.SP.800-63a |
| SP 800-63B | Authentication and Lifecycle Management | https://doi.org/10.6028/NIST.SP.800-63b |
| SP 800-63C | Federation and Assertions | https://doi.org/10.6028/NIST.SP.800-63c |
Links to the online version of the SP 800-63 suite are below.
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SP 800-63-3
Digital Identity Guidelines
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SP 800-63A
Enrollment & Identity Proofing
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SP 800-63B
Authentication & Lifecycle Management
-
SP 800-63C
Federation & Assertions
Additional informative resources:
- Frequently Asked Questions (FAQ)
- NIST SP 800-63-3 Implementation Resources (PDF)
- Conformance Criteria for SP 800-63A Enrollment and Identity Proofing (PDF)
- Conformance Criteria for SP 800-63B Authentication and Lifecycle Management (PDF)
- Conformance Criteria for SP 800-63C Federation and Assertions (PDF)