You are viewing this page in an unauthorized frame window. This is a potential security issue, you are being redirected to https://csrc.nist.gov . An official website of the United States government Here’s how you know Here’s how you know Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock ( Lock Locked padlock icon ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Search Search CSRC MENU Search Search Projects Publications Expand or Collapse Drafts for Public Comment All Public Drafts Final Pubs FIPS (standards) Special Publications (SP s ) IR (interagency/internal reports) CSWP (cybersecurity white papers) ITL Bulletins Project Descriptions Journal Articles Conference Papers Books Topics Expand or Collapse Security & Privacy Applications Technologies Sectors Laws & Regulations Activities & Products News & Updates Events Glossary About CSRC Expand or Collapse Computer Security Division Cryptographic Technology Software Security Group Hardware Security Group Security Engineering and Risk Management Applied Cybersecurity Division Cybersecurity and Privacy Applications National Cybersecurity Center of Excellence (NCCoE) National Initiative for Cybersecurity Education (NICE) Contact Us Information Technology Laboratory Computer Security Resource Center Publications NIST SP 800-63C-4 Digital Identity Guidelines: Federation and Assertions Share to Facebook Share to X Share to LinkedIn Share ia Email Documentation Topics Date Published: July 2025 Supersedes: SP 800-63C (03/02/2020) Author(s) David Temoshok (NIST) , Justin Richer (Bespoke Engineering) , Yee-Yin Choong (NIST) , James Fenton (Altmode Networks) , Naomi Lefkovitz (NIST) , Andrew Regenscheid (NIST) , Ryan Galluzzo (NIST) Abstract This guideline focuses on identity federations and the use of assertions to implement them. Federation allows a given credential service provider to provide authentication attributes and (optionally) subscriber attributes to a number of separately administered relying parties. Similarly, relying parties may use more than one credential service provider. These guidelines are not intended to constrain the development or use of standards outside of this purpose. This publication supersedes NIST Special Publication (SP) 800-63C. This guideline focuses on identity federations and the use of assertions to implement them. Federation allows a given credential service provider to provide authentication attributes and (optionally) subscriber attributes to a number of separately administered relying parties. Similarly, relying... See full abstract This guideline focuses on identity federations and the use of assertions to implement them. Federation allows a given credential service provider to provide authentication attributes and (optionally) subscriber attributes to a number of separately administered relying parties. Similarly, relying parties may use more than one credential service provider. These guidelines are not intended to constrain the development or use of standards outside of this purpose. This publication supersedes NIST Special Publication (SP) 800-63C. Hide full abstract Keywords assertions ; authentication ; credential service provider ; digital authentication ; federations ; identity provider ; digital wallets Control Families None selected Documentation Publication: https://doi.org/10.6028/NIST.SP.800-63c-4 Download URL Supplemental Material: Project homepage Publication Parts: SP 800-63-4 SP 800-63A-4 SP 800-63B-4 Document History: 12/16/22: SP 800-63C-4 (Draft) 08/21/24: SP 800-63C-4 (Draft) 07/31/25: SP 800-63C-4 (Final) Topics Security and Privacy identity & access management HEADQUARTERS 100 Bureau Drive Gaithersburg, MD 20899 X (link is external) facebook (link is external) linkedin (link is external) instagram (link is external) youtube (link is external) rss govdelivery (link is external) Want updates about CSRC and our publications? Subscribe Contact Us | Our Other Offices Send inquiries to [email protected] Site Privacy Accessibility Privacy Program Copyrights Vulnerability Disclosure No Fear Act Policy FOIA Environmental Policy Scientific Integrity Information Quality Standards Commerce.gov Science.gov USA.gov Vote.gov