Going through an onboarding process. Courtesy OPM

Going through an onboarding process. Courtesy OPM:

Are there standards and guidelines associated with two-factor authentication?
Executive Office of the President - Office of Management and Budget
M-06-16: Protection of Sensitive Agency Information - 06/23/2006
M-11-11: Continued Implementation of Homeland Security Presidential Directive (HSPD) 12 - Policy for a Common Identification Standard for Federal Employees and Contractors - 02/03/2011

National Institute of Standards and Technology
Special Publication 800-63-2: Electronic Authentication Guideline - 08/2013
Special Publication 800-53: Security and Privacy Controls for Federal Information Systems and Organizations - 01/22/2015

Internet Engineering Task Force
RFC 6238: TOTP: Time-Based One Time Password Algorithm - 05/2011

Payment Card Industry
DSS v3.1: Requirements and Security Assessment Procedures - 04/2015

U.S. Department of Health and Human Services
HIPAA Security Rule: Remote Use - 12/28/2006

North American Electric Reliability Corporation
CIP-005-5: Cyber Security - Electronic Security Perimeter(s) - 02/03/2013