Yes. The Private tab on a candidate's profile is the best location for sensitive candidate information, such as salary details. The Private tab includes a section for custom candidate fields marked as private, as well as a section for private notes.
Site Admins with the user-specific permission Can see private notes, salary info, manage offers, request approvals, and approve jobs/offers can access the entire Private tab.
Job Admins with the permission stripe Can view and edit private candidate and application fields can access custom candidate fields marked as a private, and Job Admins with the permission stripe Can view and create private notes can access private notes.