active key itself has the biggest role among other keys
Actually, the Owner key (also known as the Master key) has the biggest role and is the most important as it is used to change other keys. Once this key is lost, it can't be recovered.
Also, five questions in total was asked. Edit your post and answer all of it and then let me know when you do just that.
Here are the questions below.
How much do you know about the security keys of Hive?
Do you have enough idea about the importance of these keys?
Do you know how to locate security keys of Hive?
What are the functions/permissions of each keys and explain them?
What measures have you taken to keep your keys safe?