This is a potential security issue, you are being redirected to https://csrc.nist.gov.
NIST requests comments on SP 800-63-2, Electronic Authentication Guideline. This document describes the technical requirements necessary to meet the four Levels of Assurance that are specified in the OMB memorandum M-04-04, E-Authentication Guidance for Federal Agencies. Comment period CLOSED on: May 22, 2015. For more information, please visit the Trusted Identities Group.
Security and Privacy: authentication