The primary goal of security is the detection and prevention of security violations on a system. Computer security includes the following fundamental aspects. User Administration User administration consists of creating users and groups and defining their attributes. A major attribute of users is how they are authenticated. Users are the primary agents on the system.
Groups are collections of users who can share access permissions for protected resources.
A group has an ID and is composed of members and administrators. The creator of the group is usually the first administrator. Environment Specifies the home or shell environment. The operating system allows for greater control, if desired, with extended attributes. Security information can also be separately protected from public access.