Confidentiality denotes protecting the data from unauthorized access. We cannot disclose our data to everyone if it is critical, such as the bank statement, which includes all our financial transactions. We must ensure that a bank statement is disclosed only to our banker or the accountant who works on it. Similarly, this applies for an organization as well. In an organization, we have multiple departments and different roles. Here we define the roles for each user to access the information. Alternatively, you can say we define rules to decide who will access what.