The set of attribute values (i.e., characteristics) by which an entity is recognizable and that, within the scope of an identity manager’s responsibility, is sufficient to distinguish that entity from any other entity.
Source(s):
NIST SP 800-161 under Identity from CNSSI 4009
NISTIR 7622 under Identity from CNSSI 4009-2010

  The set of physical and behavioral characteristics by which an individual is uniquely recognizable. Note: This also encompasses non-person entities (NPEs).
Source(s):
CNSSI 4009-2015 from FIPS 201-1

  The set of physical and behavioral characteristics by which an individual is uniquely recognizable.
Source(s):
NIST SP 800-79-2 under Identity
NIST SP 1800-12b
FIPS 201 [version unknown] under Identity

  Information that is unique within a security domain and which is recognized as denoting a particular entity within that domain.
Source(s):
NIST SP 800-33 [Withdrawn]
NIST SP 800-27 Rev. A [Withdrawn]

  The bit string denoting the identifier associated with an entity.
Source(s):
NIST SP 800-56A Rev. 2 [Superseded] under ID
NIST SP 800-56B Rev. 2 under ID
NIST SP 800-56B Rev. 1 [Superseded] under ID

  The distinguishing character or personality of an entity.
Source(s):
NIST SP 800-57 Part 1 Rev. 4 [Superseded] under Identity
NIST SP 800-57 Part 1 Rev. 5 under Identity
NIST SP 800-57 Part 1 Rev. 3 [Superseded] under Identity

  An attribute or set of attributes that uniquely describe a subject within a given context.
Source(s):
NIST SP 1800-17b under Identity
NIST SP 1800-17c under Identity
NIST SP 800-63-3 under Identity

  A set of attributes that uniquely describe a person within a given context.
Source(s):
NISTIR 8149 under Identity from NIST SP 800-63-3
NIST SP 800-63-2 [Superseded] under Identity