What is called the act of a user professing an identity to a system, usually in the form of a log-on ID?

A.
Authentication

B.
Identification

C.
Authorization

D.
Confidentiality

Explanation:
Identification involves a user supplying identification information using a username, user ID, or account number.
Incorrect Answers:
A: Authentication involves verifying a user’s identification information using a passphrase, PIN value, biometric,
one-time password, or password.
C: Authorization is when a system establishes whether the user is authorized to access the particular resource
and what actions he is permitted to perform on that resource.
D: Confidentiality is used to make sure that the required level of secrecy is imposed at every junction of data
processing and prevents unauthorized disclosure.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 24, 166, 203