Answer:
Whitelisting
Explanation:
What is Whitelisting
Application whitelisting specifies a list of application that are allowed to run, but no others are.
Answer:Private means: Belonging to, or for the use of, a particular person or group of people.
Confidential means: Intended to be kept secret. So, a private conversation would only be confidential if what is discussed is intended to be kept secret (from others).
#2: Portrait taller than wide & landscape wider than tall