Biometric Factor

Full Title or Meme

Biometric Attributes of the biologic phenotype of a User may be used to Identify that user.

Biometric Attributes are taken to be exclusively the measure of human characteristics like fingerprint, facial and behavior patterns.
The human characteristics are another factor that can be a part of Multi-factor Authentication.
So the human characteristics can be considered to be a Credential.
The measurements of the characteristic are compared against a template of the characteristics using some Assurance level to produce a Validated claim.

False positives typically come from either relaxed testing, environmental noise or obsolete technology.
False negatives infuriate Users which is why false positives are tolerated.
Attacks against the sensor capabilities. Various movie and television plots have shown the attacks like taking someone's eyeball, or using a thin-film replica of a finger print to complete an Authentication which Authorizes access.
Attacks against the template store. Access to the Authentication data store can often be the simplest attack as it is based on known techniques.
Biometric Attributes attached to official documents may inadvertently become Biometric Identifiers which invade the user's privacy. See the wiki page Biometric Identifier for user cases where that has damaged a user's life.

ISO 30107-3:2017 describes testing of Biometric Attribute presentations.
The first Level 1 rating in the NIST/NVLAP-certified iBeta Presentation Attack Detection (PAD) Certification test was granted on (2018-09-23) to facetec^[1]