Todd has been asked by the security officer to purchase a counter-based authentication system. Which of the following best describes this type of system?
A.
A biometric system that bases authentication decisions on behavioral attributes.
B.
A biometric system that bases authentication decisions on physical attributes.
C.
An authentication system that creates one-time passwords that are encrypted with secret keys.
D.
An authentication system that uses passphrases that are converted into virtual passwords.
C is correct;
In Counter-based tokens, both the token and the authenticating server maintain a counter, whose value besides a shared secret key are used to generate the one-time password. This type of tokens requires one or more actions from the user before generating and displaying the one-time password
In Counter-based tokens, both the token and the authenticating server maintain a counter, whose value besides a shared secret key are used to generate the one-time password.
This type of tokens requires one or more actions from the user before generating and displaying the one-time password. Usually the actions are pushing a power-on button, and in some types to enter a PIN number. The user action(s) will cause the token and the authenticating server to increment the counter.
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