NIST SP 800-63-4: Digital Identity Guidelines

Published

August 1, 2025

Author(s)

David Temoshok, Yee-Yin Choong, Ryan Galluzzo, Marie LaSalle, Andrew Regenscheid, Diana Proud-Madruga, Sarbari Gupta, Naomi Lefkovitz

Abstract

These guidelines cover identity proofing, authentication, and federation of users (such as employees, contractors, or private individuals) interacting with government information systems over networks. They define technical requirements in each of the areas of identity proofing, enrollment, authenticators, management processes, authentication protocols, federation, and related assertions. They also offer technical recommendations and other informative text intended as helpful suggestions. The guidelines are not intended to constrain the development or use of standards outside of this purpose. This publication supersedes NIST Special Publication (SP) 800-63-3.

Citation

Special Publication (NIST SP) - 800-63-4

Report Number

800-63-4

NIST Pub Series

Special Publication (NIST SP)

Pub Type

NIST Pubs

Download Paper

https://doi.org/10.6028/NIST.SP.800-63-4

Local Download

Keywords

authentication, authentication assurance, authenticator, assertions, credential service provider, digital authentication, identity proofing, federation, passwords, PKI.

Citation

Temoshok, D. , Choong, Y. , Galluzzo, R. , LaSalle, M. , Regenscheid, A. , Proud-Madruga, D. , Gupta, S. and Lefkovitz, N. (2025), NIST SP 800-63-4: Digital Identity Guidelines, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.SP.800-63-4, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=959880 (Accessed August 7, 2025)