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1. Computer Security:
Authentication
Knowledge, Physical, and Biometric Authentication Methods

2. Knowledge Based Authentication
 Generally the least effective protective measure
 Also known as KBA
 Two Types: Static and Dynamic KBA
 Static KBA is previously provided information
 Dynamic KBA uses privately compiled questions

3. Physical Authentication
 A form of authentication through objects
 Some forms act as a key
 Others provide one time passwords
 Examples: keycards, dongles, and security tokens.

4. Biometric Authentication
 Generally the most secure authentication method.
 Uses recorded physical traits to identify.
 Require special scanners, can be inconvenient.
 Some forms are: Fingerprint, retina, and face scanners.

5. References
 http://science.opposingviews.com/types-computer-
authentication-3443.html
 https://en.wikipedia.org/wiki/Knowledge-
based_authentication
 http://www.tweakandtrick.com/2012/06/most-common-
authentication-methods-used.html
 http://quick2day.in/wp-content/uploads/2015/04/Login-With-
Username-Password-by-digitalart-FreeDigitalPhoyos.net_-
e1357734658310.jpg
 https://upload.wikimedia.org/wikipedia/commons/8/8f/SecureI
D_token_new.JPG
 http://www.sencor.eu/getattachment/ae0d5f80-b271-4542-
9c8d-8443e7fb4269/ELEMENT-SMART-DONGLE-
QUAD.aspx