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2.3 A Few Limitations

NIST PIV and digital identity SP 800-63-3
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A Few Limitations

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These technical guidelines do not address the authentication of subjects for physical access (e.g., to buildings), though some authenticators used for digital access may also be used for physical access authentication. Additionally, this revision of these guidelines does not explicitly address device identity, often referred to as machine-to-machine (such as router-to-router) authentication or interconnected devices, commonly referred to as the internet of things (IoT). That said, these guidelines are written to refer to generic subjects wherever possible to leave open the possibility for applicability to devices. Also excluded are specific requirements for issuing authenticators to devices when they are used in authentication protocols with people.