X Window Authorization
In the X Window System, programs connect to the X server, possibly via a computer network. Since the network may be accessible to other users, a method for forbidding access to programs run by users different from the one who is logged in is necessary.
There are five standard access control mechanisms that control whether a client application can connect to an X server. They can be grouped in three categories:
- access based on host
- access based on cookie
- access based on user
Additionally, like every other network connection, tunnelling can be used.
Read more about X Window Authorization: Host-based Access, Cookie-based Access, User-based Access, Tunneling
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