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Digital Identity Guidelines: Enrollment and Identity Proofing [includes updates as of 03-02-2020]



Paul A. Grassi, James L. Fenton, Naomi Lefkovitz, Jamie M. Danker, Yee-Yin Choong, Kristen K. Greene, Mary Theofanos


These guidelines provide technical requirements for federal agencies implementing digital identity services and are not intended to constrain the development or use of standards outside of this purpose. This guideline focuses on the enrollment and verification of an identity for use in digital authentication. Central to this is a process known as identity proofing in which an applicant provides evidence to a credential service provider (CSP) reliably identifying themselves, thereby allowing the CSP to assert that identification at a useful identity assurance level. This document defines technical requirements for each of three identity assurance levels. This publication supersedes corresponding sections of NIST Special Publication (SP) 800-63-2.
Special Publication (NIST SP) - 800-63A
Report Number


authentication, credential service provider, electronic authentication, digital authentication, electronic credentials, digital credentials, identity proofing, federation


Grassi, P. , Fenton, J. , Lefkovitz, N. , Danker, J. , Choong, Y. , Greene, K. and Theofanos, M. (2020), Digital Identity Guidelines: Enrollment and Identity Proofing [includes updates as of 03-02-2020], Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed April 16, 2024)
Created March 1, 2020, Updated October 12, 2021