Hi Zopers For a multi-national military project I have suggested using Plone as CMS and collaboration platform. However, I need to convince people that Zope/Plone is secure enough to prevent leaking of sensitive data. Is it possible to set up a publicly accessible Web server with Plone that contains public as well as private data neatly separated depending on login user and group? Even group members should not be able to see data of other groups unless explicitly permitted to do so. What is the best pattern of use? Are there good examples of similar deployments (NATO, NASA)? How do they deal with this? thanks a lot for your help Andre -- Dr. Andre P. Meyer http://home.hccnet.nl/a.meyer/ TNO FEL Command & Control and Simulation, http://www.fel.tno.nl/div2/ Delft Cooperation on Intelligent Systems, http://www.decis.nl/