Role-Based Access Control (RBAC) restricts access to client data based on the role of the staff member, ensuring that only those with a legitimate need can access sensitive information. For example, administrative staff may have access to scheduling information, while only estheticians can view treatment records. Implementing RBAC helps minimize the risk of unauthorized access and ensures that client data is only accessed by those who need it to perform their job functions. This protocol is key to maintaining strict control over who can access sensitive data.