Authorization is mechanism or process to validate that particular user is authorise to use any system. Authorization is different from Authentication.
In Authorization, we generally check that particular user is has right to use that system.
Let’s take an example to understand.
Suppose there is one clerk in bank. he has only access to stationary department and he does not have access to finance department so, although he is employee of Bank means he is authenticated person but yet he is not authorised to access finance department.