Security is the degree of protection against danger, loss, and criminals. Security has to be compared and contrasted with other related concepts safety continuity and reliability. The key difference between security and reliability is that security must take into account the actions of people attempting to cause destruction. Security as a form of protection is structures and processes that provide or improve security as a condition. Biometrics comprises methods for uniquely recognizing humans based upon one or more intrinsic traits computer science, in particular, biometrics is used as a form of identity access management and access control. It is also used to identify individuals in groups that are under surveillance. Biometric characteristics can be divided in two main classes:
- Physiological are related to the shape of the body. Examples include, but are not limited to fingerprint, face recognition, DNA, hand and palm geometry, iris recognition, which has largely replaced retina.
- Behavioral are related to the behaviour of a person. Examples include, but are not limited to typing rhythm, gait, and voice. Some researchers have coined the term behaviour metrics for this class of biometrics.
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