What type of control involves restricting access based on the internal data of each field?

Content-dependent control is a mechanism that restricts access based on the specific content of the data fields in question. This type of control evaluates the actual information contained within fields to determine whether access should be granted or denied. For example, a content-dependent access control system may allow access to certain users based on the sensitivity level of the information, such as allowing only users with specific clearance levels to view confidential data fields.

In contrast, other access control types focus on different criteria. Role-based access control assigns permissions based on user roles rather than the content itself, and time-dependent control restricts access based on specific time frames. Context-dependent control considers the context in which access is requested, such as the location or device used, but again does not analyze the content of the data fields. Therefore, content-dependent control is uniquely focused on the internal data of each field for making access determinations.