NIST SP 800-63 Digital Identity Guidelines

Digital Identity Guidelines This revision of NIST SP 800-63 has been superseded by NIST SP 800-63-4 as of August 1, 2025.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.

  • SP 800-63-3

    SP 800-63-3

    Digital Identity Guidelines
  • SP 800-63A

    SP 800-63A

    Enrollment & Identity Proofing
  • SP 800-63B

    SP 800-63B

    Authentication & Lifecycle Management
  • SP 800-63C

    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)

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