Description: In the context of access control systems, a ‘subject’ refers to any entity that can perform actions on objects within the system, such as files, processes, or sockets. Subjects are fundamental to access control models, as they determine who can access what resources and under what conditions. Each subject has an associated security context, which includes information about its identity and the permissions it holds. This context is used to evaluate the security policies defined in the system, thus allowing for granular control over permitted operations. Subjects can be users, processes, or systems, and their behavior is regulated by the security policies implemented in the system. Proper identification and management of subjects is crucial for maintaining the integrity and security of the system, as any unauthorized action can compromise the overall security of the operating environment. In summary, the concept of subject in access control is essential for implementing a robust security system, where each entity is evaluated and controlled according to the defined access policies.
