Which process involves establishing the validity of a claimed identity provided by a user?

• A. Authentication
• B. Authorization
• C. Identification
• D. Accountability

Answer: (C)

The process that involves establishing the validity of a claimed identity provided by a user is authentication. Authentication is the mechanism used to confirm that the individual or entity trying to access a system or service is indeed who they say they are. It typically involves verifying credentials such as passwords, biometrics, or security tokens attached to the claimed identity.

In the context of information security, authentication serves as a critical first step in ensuring that sensitive data and resources are accessed by authorized individuals only. For example, when you log into your bank account, the bank verifies your credentials to confirm your identity before granting you access.

Identification, on the other hand, is about expressing or transmitting a claim to an identity—it’s the process of providing an identity (like a username or ID number) but does not validate it. Authorization follows authentication and determines whether the authenticated user has permission to perform specific actions or access particular resources. Accountability refers to the ability to trace actions performed by users back to their identities, which involves logging and monitoring rather than validating identity itself.