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X Windows Security: How to Protect your Display
- Abstract
- The X Windows is as described in the X man pages a "portable, network-transparent window system". X Windows is such a powerful and flexible interface that the user does not have to be in front of the machine to interact with it. Instead, the user can be remotely located working in a transparent way. X Windows uses a client/server model, where the client-server communications are done following the X protocol. X Windows as the time of this writing is in its version eleven, release 6 (X11R6). The X consortium is in charge of maintaining the X Windows System and provides it free of charge and open source. X Windows is the standard protocol among UNIX-like systems, but it is so popular that there are also implementations for personal computers and Macintosh that allow X emulation. There is even dedicate hardware equipment that only knows how to talk the X protocol language, the so called X-terminals. This paper analyzes the threads and describe the security involved in the X Window Systems. It takes a practical overview of the X Windows security to emphasize the risks and indicate the measurements that must be taken.