Answer:
The answer to this question is "Confidentiality".
Explanation:
The answer is Confidentiality because in any computer system many files are important for there user. If the file was deleted, corrupted or stolen from the computer. So the user faces the difficulty to avoid this type of problem computer system provides a technique that is access control or it is also known as Confidentiality. It is a technique that controls who or what type of user's use of resources in a computing environment.
So the answer to this question is Confidentiality.