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Authorization Authentication Meaning

Authentication and authorization are complementary processes that control access to digital systems. Authentication is the first step: it verifies the identity of a user or system by validating credentials such as passwords, security tokens or biometric data. Without a successful authentication, a system cannot know who is requesting access.

Once identity has been confirmed, authorization determines what an authenticated user is allowed to do. Permissions define whether a user can view, modify or delete particular resources. In role‑based access control systems, users are assigned roles with predefined rights; in attribute‑based systems, policies evaluate attributes such as department or time of day.

Implementing strong authentication reduces the risk of unauthorized access, while granular authorization ensures that even legitimate users only perform tasks necessary for their roles. Together, they form the foundation of a secure access model for applications, databases and networks.

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