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This refers to the restriction of unauthorized access to a portion of computer system or the entire system. To gain access the user must be authenticated and this can be done in three steps:
- To allow physical access to the terminal
- To access the system
- To access specific commands transactions privileges programs and data within the system.
Access control can be accomplished by the user using something the user has e.g. token or smartcard or using the user e.g. signature, voice, fingerprint or retinal scan which are all implemented through biometric controls.
A biometric control is defined as an automated method of verifying the identity of a person based on psychological or behavioral characteristics. Common biometrics includes a photographs, fingerprint, voice, signature, hand geometry, keystroke dynamics and blood vessel patterns in the retina of a person’s eye.
Kavungya answered the question on May 10, 2019 at 13:14
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