The difference between authentication and autorization

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Authentication is the process where an entity proves the identity of another entity, typically through credentials, such as a user name and password. Simply put, it means that who you are.

Authorization is how your application provides access controls for resources and operations. In other words, it defines what you can do.

한줄요약: 인증(authentication)은 사용자의 유효성을 입증하는 절차이고, 인가(authorization)는 권한을 부여하는 절차이다.