This publication may be used by nongovernmental organizations on a voluntary basis and is not subject to copyright in the United States. Nor should these guidelines be interpreted as altering or superseding the existing authorities of the Secretary of Commerce, Director of the OMB, or any other federal official. Nothing in this publication should be taken to contradict the standards and guidelines made mandatory and binding on federal agencies by the Secretary of Commerce under statutory authority. This guideline is consistent with the requirements of the Office of Management and Budget (OMB) Circular A-130. NIST is responsible for developing information security standards and guidelines, including minimum requirements for federal systems, but such standards and guidelines shall not apply to national security systems without the express approval of appropriate federal officials exercising policy authority over such systems. This publication has been developed by NIST in accordance with its statutory responsibilities under the Federal Information Security Modernization Act (FISMA) of 2014, 44 U.S.C. Kent Rochford, Acting NIST Director and Under Secretary of Commerce for Standards and  National Institute of Standards and Technology  This publication is available free of charge from: National Protection and Programs Directorate NIST Special Publication 800-63B Digital Identity Guidelines Authentication and Lifecycle Management Paul A.

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