Code Security is all about allowing and preventing code from running. The . NET Security Model works by the assemblies each having their own Evidence embedded in the Assembly by the Assembly writer. When the CLR loads the assembly it then reads and applies this Evidence to a Security model and this in turn returns Permissions , depending on what Permissions are returned will determine is the assembly is permitted to execute or not. So it's Evidence in (on the assembly) -> Code Groups -> Permissions. Code Access Security (CAS) is the the mechanism used by .NET to manage all of this. It's function is to process assemblies and determine the runtime permissions they should have, e.g. should they code within a certain assembly be allowed to run or not. All assemblies have Evidence. As the CLR is loading the assembly it looks at this Evidence and processes it using the current machines .NET Code Group. Depending on where the assembly is being loaded from, the Evidence it has,...
Layman explanations of Software coding and configuration techniques. With example code where possible.