Client files can only be accessed by employees who need to know the information and have specified roles in the company. Which of the following best describes this security concept?

Confidentiality ensures that information is accessible only to authorized individuals. In this scenario, client files are restricted to employees with a "need to know" and specific roles, directly aligning with the principle of preventing unauthorized disclosure. Availability ensures that systems and data are accessible to authorized users when needed. Integrity focuses on maintaining the accuracy and completeness of data, preventing unauthorized modification. Non-repudiation provides assurance that a party cannot deny having performed an action, which is not the primary focus here.