entry points security

How and in the chat when dad asked me recently, I told dad again before long my company will be on the market, Dad listened to my story that I have to do now is getting better and better, I heard my father say that I said I together with the company growth. After Dad asked me recently to have no understanding of entry points security, after listening to my father about what I said I heard one of my friends told me that entry points security but I did not get to know it, Dad listened to my story and said let me understand a say I understand after will bring me a lot of help.