Without authentication, it is impossible to assure who an entity is and whether or not to authorize any action at all.

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Authentication is the process of verifying the identity of an entity, whether it is a user, computer system, device, or application. Without authentication, there is no way to determine who the entity is and whether they have the right to access certain resources or perform certain actions. This is why authentication is a fundamental security mechanism that is essential for protecting sensitive information and ensuring that only authorized users can access it.

Without Authentication, It Is Impossible to Assure Who an Entity