Two A’s

  1. Authentication— In the authentication phase, you check a username or password against a database of valid usernames and passwords. If a match comes up, you move to the second phase.

  2. Authorization— In the authorization phase, you check the username (or password if only passwords are used) against a database to define how much access that user is granted. First a system authenticates you, and then a system authorizes you based on your security access level.


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