Authentication vs Authorization

What's different between Authentication and Authorization ?

Authentication : 입증, 증명, 인증
Authorization : 허가
(※Authentification : 없는 단어이나 사람들이 자주 씀. like Indentification ... 비슷하게 쓸려는 경향이 있음)

Authentication,

in the form of a key. The lock on the door only grants access to someone with the correct key in much the same way that a system only grants access to users who have the correct credentials.

Authorization,

in the form of permissions. Once inside, the person has the authorization to access the kitchen and open the cupboard that holds the pet food. The person may not have permission to go into the bedroom for a quick nap.