You can prevent information leakage by managing the machine and protecting documents.
You can protect documents from unauthorized access and stop them from being copied without permission.
You can control the use of the machine, as well as prevent machine settings from being changed without authorization.
By setting passwords, you can prevent unauthorized access via the network.
You can erase the data on the hard disk to prevent the information from leaking out.
You can limit the volume of the usage of the machine for each user.
See Security Reference.