Authentication is the process of verifying the identity of an entity (person, system, or device) seeking access to resources.
Typically involves something the user knows (password), has (token), or is (biometric).
Comparison with Related Terms:
Identification: Specifies who the user claims to be (e.g., username).
Authorization: Determines what resources the authenticated user can access.
Accountability: Tracks user actions after authentication and authorization.
References:
EC-Council CISO Handbook: Access Control Mechanisms and Processes.
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