Is there a difference between authentication and authorization?

Question

I see these two terms bandied about quite a bit (specifically in web-based scenarios but I suppose it\'s not limited to that) and I was wondering whether or not there was a

Answer 1

Authentication: An application needs to know who is accessing the application. So authentication is related to word who. Application will check it by a login form. User will enter user name and password and these inputs will be validated by the application. Once the validation is successful, user is declared as authenticated.

Authorization is to check whether user can access the application or not or what user can access and what user can not access. Source: Authentcation Vs Authorization