I tried but it doesn't work, the problem is not the key. It is really easy to reproduce, take WurflExplorer sample, add in web.config <trust level="Medium"/> and you'll get the SecurityException. The medium trust level is largely used by hosting providers and they do not let their users to change it.

Post update I downloaded and installed the NuGet 1.4.1.0 version that has the correct DLLs and signatures. But this doesn't solve the problem when the hosting provider uses trust level="Medium" The following error is returned when I deploy on the hosting provider System.Security.SecurityException: T...

I installed WURFL using NuGet for Visual Studio 2012, but I discovered a first problem: The installed Wurfl.Aspnet.Extensions.dll version is 1.4.3.0, but in the web.config a worng entry was automatically written <section name="wurfl" type="WURFL.Aspnet.Extensions.Config.WURFLConfigurationSection, Wu...