What is called the verification that the user’s claimed identity is valid and is usually implemented through a user password at log-on time?

What is called the verification that the user’s claimed identity is valid and is usually implemented through a user password at log-on time?
A .  Authentication
B .  Identification
C .  Integrity
D .  Confidentiality

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Answer: A

Explanation: Authentication is verification that the user’s claimed identity is valid and is usually implemented through a user password at log-on time. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 36