About User Authentication
User authentication is a system requiring the login user name and password for verifying users to operate the machine or access the machine over the network.
![Illustration of User Authentication numbered callout illustration](../../security/image/eab075.gif)
User
A user is authorized to perform normal operations on the machine such as printing documents.
Group
A group is authorized to perform normal operations on the machine such as printing documents.
Unauthorized user
Unauthorized access