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? 

Answer options:

A. Authentication
B. Identification
C. Integrity
D. Confidentiality

A

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.