Code Access Security (CAS) Policy - Tool Caspol.exe

Security policy is expressed using three policy levels: machine policy, user policy, and enterprise policy. The set of permissions that an assembly receives is determined by the intersection of the permission sets allowed by these three policy levels. Each policy level is represented by a hierarchical structure of code groups. Every code group has a membership condition that determines which code is a member of that group. A named permission set is also associated with each code group. This permission set specifies the permissions the runtime allows code that satisfies the membership condition to have. A code group hierarchy, along with its associated named permission sets, defines and maintains each level of security policy. You can use the–user, -customuser, –machine and -enterprise options to set the level of security policy.