Interactive visualization of file protection mechanisms in operating systems. Learn about access control, file permissions, encryption, and security with step-by-step animations.
File protection is a critical component of operating system security that prevents unauthorized access, modification, or deletion of files. It ensures that only authorized users or processes can access specific files based on predefined access control policies.
File protection mechanisms include access control lists (ACLs), discretionary access control (DAC), mandatory access control (MAC), and encryption. These mechanisms work together to provide a comprehensive security framework for file systems.
Interactive step-by-step visualization of file protection mechanisms
Understanding the fundamental principles of file protection
Access control lists define which users or system processes are granted access to objects, as well as what operations are allowed on given objects. Each object has a security attribute that identifies its access control list.
Discretionary access control allows users to control access to their own files. The owner of a file determines which subjects can access which objects. This model is flexible but can be less secure due to user control.
Mandatory access control restricts the ability to control access to resources. Users cannot change access permissions to any object. Access decisions are based on system-wide policies rather than user discretion.
File encryption transforms data into a format that cannot be understood without a key. Even if unauthorized access occurs, encrypted files remain protected. Encryption can be applied at the file or filesystem level.