What is the difference between authentication (AuthN) versus authorization (AuthZ)? While these two fundamental security terms are often confused with each other, the only real similarity is they both begin with the letter “A” and are linked by an account. In concept, one verifies the account (authentication) and the other sanctions (authorization) the account to perform a task. Because these terms are so fundamental, it’s crucial to understand the difference between them, and the implications for each when the concepts are blended.

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