They are inherently more reliable, since biometric traits cannot be lost or forgotten, they are more difficult to forge, copy, share, and distribute, and they require the person being authenticated to be present at the time and point of authentication.
Based on the level of user involvement when capturing the biometric traits, biometrics can be further defined as either active or passive.
Multimodal biometric systems are developed to address few of the limitations of unibiometric systems and works on the principle of using more than one biometric trait for human recognition.
It is of particular note that glucose, which was measured in the fasted state, was more correlated to gene expression variation in the fed state, whereas biometric traits (such as maximum hip circumference) were more correlated with gene expression traits in response to feeding.
One reason is that false matches are more likely between faces of people sharing the same soft biometric traits.
Besides the fact that subjects share biometric traits rather reluctantly, the common use of biometrics is often considered as a threat to privacy [209].
The program is part of a forty-two-million-dollar contract drafted in 2014, and collects data such as telephone records, addresses, social-media content, immigration history, biometric traits, and criminal records.
The combination of biometric systems, also known as "biometric fusion", can be classified into unimodal biometric if it is based on a single biometric trait and multimodal biometric if it uses several biometric traits for person authentication.
Fingerprints are among the most used biometric traits for identification.
The owner of biometric traits is not able to revoke her biometric when it is compromised.
