DotNetNuke provides extremely thorough security. Each user group is provided its own permissions, and all users can be sorted into these groups based upon what the operations require. As opposed to other CMSs that may require you to install a third party (and probably weak) application, DotNetNuke has a security model built into the CMS architecture. This makes DNN one of the most secure platforms for websites on the market.
Ultimate Platform Flexibility
DNN, because it is based on ASP.NET, is extremely extensible with pre-made or custom modules. It can be easily integrated with virtually any business application, especially those in the Microsoft stack of Dynamics (GP, CRM, etc.).
DotNetNuke's efficient code base ensures that websites run quickly to provide a great user experience for all of your site visitors.