The repository is for the active development of a proposed new model for a NIST 800 series Special Publication:

• SP 800-63-3: Digital Authentication Guideline
• SP 800-63A: Enrollment and Identity Proofing
• SP 800-63B: Authentication and Lifecycle Management
• SP 800-63C: Federation and Assertions

Full HTML version can be viewed at https://pages.nist.gov/800-63-3

Source information, current standards, and public comments received through May 2015 can be found here.