File Protection

File protection one of the major function of file system is to protect this information against unauthorized access and physical menage may occur because of hardware problem. File can be protected from unauthorized access providing various users different access right.
Access control : It is the most common approach to protect the file depending upon the identity of the user. Access control limits who can access files and how they can access them.
Password protection :  It is another approach to protect the file from an unauthorized access in to use password with each file.