diff --git a/redback-authorization/redback-authorization-api/src/main/java/org/apache/archiva/redback/authorization/RedbackAuthorization.java b/redback-authorization/redback-authorization-api/src/main/java/org/apache/archiva/redback/authorization/RedbackAuthorization.java
index c680f0f..e686cbf 100644
--- a/redback-authorization/redback-authorization-api/src/main/java/org/apache/archiva/redback/authorization/RedbackAuthorization.java
+++ b/redback-authorization/redback-authorization-api/src/main/java/org/apache/archiva/redback/authorization/RedbackAuthorization.java
@@ -25,6 +25,9 @@
 import java.lang.annotation.Target;
 
 /**
+ * Authorization annotation. The annotation can be defined for methods and describes
+ * the permissions necessary to execute the method.
+ *
  * @author Olivier Lamy
  * @since 1.3
  */
@@ -34,17 +37,25 @@
 {
 
     /**
-     * @return at least one of those redback roles is needed
+     * The list of permissions that are needed for executing the method.
+     * The strings refer to defined permission ids.
+     * The accessing user must have at least one of the given permissions to execute
+     * the method.
+     * @return the array of permission ids.
      */
     String[] permissions() default ( "" );
 
     /**
+     * The resource is used to restrict access by using information from
+     * the method parameters or call environment.
+     * Resource annotations have to be in line with the defined permissions.
      * @return the redback ressource karma needed
      */
     String resource() default ( "" );
 
     /**
-     * @return doc
+     * A description of the authorization definition.
+     * @return the description string
      */
     String description() default ( "" );
 
diff --git a/redback-authorization/redback-authorization-providers/redback-authorization-rbac/src/main/java/org/apache/archiva/redback/authorization/rbac/evaluator/DefaultPermissionEvaluator.java b/redback-authorization/redback-authorization-providers/redback-authorization-rbac/src/main/java/org/apache/archiva/redback/authorization/rbac/evaluator/DefaultPermissionEvaluator.java
index b62efe7..f33ec7c 100644
--- a/redback-authorization/redback-authorization-providers/redback-authorization-rbac/src/main/java/org/apache/archiva/redback/authorization/rbac/evaluator/DefaultPermissionEvaluator.java
+++ b/redback-authorization/redback-authorization-providers/redback-authorization-rbac/src/main/java/org/apache/archiva/redback/authorization/rbac/evaluator/DefaultPermissionEvaluator.java
@@ -24,6 +24,7 @@
 import org.apache.archiva.redback.users.UserManagerException;
 import org.apache.archiva.redback.users.UserNotFoundException;
 import org.apache.archiva.redback.rbac.Permission;
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.stereotype.Service;
 
 import javax.inject.Inject;
@@ -81,8 +82,10 @@
                 return true;
             }
 
-            // if we are not checking a specific resource, the operation is enough
-            if ( resource == null )
+            // Resource settings on the permission object and on the annotation
+            // should be in line. If not, we use the least privilege, which means
+            // if one of both is set, we will check for equality.
+            if ( StringUtils.isEmpty( permissionResource ) && resource == null )
             {
                 return true;
             }
diff --git a/redback-authorization/redback-authorization-providers/redback-authorization-rbac/src/test/java/org/apache/archiva/redback/authorization/rbac/evaluator/PermissionEvaluatorTest.java b/redback-authorization/redback-authorization-providers/redback-authorization-rbac/src/test/java/org/apache/archiva/redback/authorization/rbac/evaluator/PermissionEvaluatorTest.java
index fdff955..36454d7 100644
--- a/redback-authorization/redback-authorization-providers/redback-authorization-rbac/src/test/java/org/apache/archiva/redback/authorization/rbac/evaluator/PermissionEvaluatorTest.java
+++ b/redback-authorization/redback-authorization-providers/redback-authorization-rbac/src/test/java/org/apache/archiva/redback/authorization/rbac/evaluator/PermissionEvaluatorTest.java
@@ -26,6 +26,7 @@
 import org.apache.archiva.redback.rbac.memory.MemoryOperation;
 import org.apache.archiva.redback.rbac.memory.MemoryPermission;
 import org.apache.archiva.redback.rbac.memory.MemoryResource;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.test.context.ContextConfiguration;
@@ -46,9 +47,11 @@
     public void testNullResource()
         throws PermissionEvaluationException
     {
-        // null resources should be considered as matching if any resource is obtained.
-        // we do this instead of using "global" as that is the inverse - you are allocated global rights,
-        // which is right to everything. null is the right to anything.
+
+        // if the permission has explicitly a resource set, we should explicitly
+        // provide resources during access check (e.g. define a resource in the annotations).
+        // This is for consistency and least privilege permission. So, e.g. if you forget to define the resource
+        // on a method annotation, it should deny access for non-global roles.
 
         Resource resource = new MemoryResource();
         resource.setIdentifier( "Resource" );
@@ -61,6 +64,6 @@
         permission.setOperation( operation );
         permission.setResource( resource );
 
-        assertTrue( permissionEvaluator.evaluate( permission, "Operation", null, "brett" ) );
+        assertFalse( permissionEvaluator.evaluate( permission, "Operation", null, "brett" ) );
     }
 }
diff --git a/redback-integrations/redback-rest/redback-rest-api/src/main/java/org/apache/archiva/redback/rest/api/services/v2/UserService.java b/redback-integrations/redback-rest/redback-rest-api/src/main/java/org/apache/archiva/redback/rest/api/services/v2/UserService.java
index acfe4ed..bb103e3 100644
--- a/redback-integrations/redback-rest/redback-rest-api/src/main/java/org/apache/archiva/redback/rest/api/services/v2/UserService.java
+++ b/redback-integrations/redback-rest/redback-rest-api/src/main/java/org/apache/archiva/redback/rest/api/services/v2/UserService.java
@@ -63,7 +63,8 @@
     @Path( "{userId}" )
     @GET
     @Produces( { MediaType.APPLICATION_JSON } )
-    @RedbackAuthorization( permissions = RedbackRoleConstants.USER_MANAGEMENT_USER_EDIT_OPERATION )
+    @RedbackAuthorization( permissions = RedbackRoleConstants.USER_MANAGEMENT_USER_EDIT_OPERATION,
+    resource = "{userId}" )
     User getUser( @PathParam( "userId" ) String userId )
         throws RedbackServiceException;
 
diff --git a/redback-integrations/redback-rest/redback-rest-services/src/main/java/org/apache/archiva/redback/rest/services/interceptors/PermissionsInterceptor.java b/redback-integrations/redback-rest/redback-rest-services/src/main/java/org/apache/archiva/redback/rest/services/interceptors/PermissionsInterceptor.java
index e19a542..1cbff25 100644
--- a/redback-integrations/redback-rest/redback-rest-services/src/main/java/org/apache/archiva/redback/rest/services/interceptors/PermissionsInterceptor.java
+++ b/redback-integrations/redback-rest/redback-rest-services/src/main/java/org/apache/archiva/redback/rest/services/interceptors/PermissionsInterceptor.java
@@ -162,6 +162,7 @@
             }
             else
             {
+                // The noPermission is only valid, if the user is authenticated
                 if ( redbackAuthorization.noPermission() )
                 {
                     AuthenticationResult authenticationResult = getAuthenticationResult( containerRequestContext, httpAuthenticator, request );
diff --git a/redback-rbac/redback-rbac-model/src/main/java/org/apache/archiva/redback/rbac/Resource.java b/redback-rbac/redback-rbac-model/src/main/java/org/apache/archiva/redback/rbac/Resource.java
index 3a3980a..9ec0876 100644
--- a/redback-rbac/redback-rbac-model/src/main/java/org/apache/archiva/redback/rbac/Resource.java
+++ b/redback-rbac/redback-rbac-model/src/main/java/org/apache/archiva/redback/rbac/Resource.java
@@ -31,6 +31,8 @@
  * wildcards can be used on the resource definition to streamline the assigning of
  * permissions for _large_ sets of things.
  *
+ * The <code>GLOBAL</code> resource is a catch-all for all resource strings.
+ *
  * @author Jesse McConnell
  * @author <a href="mailto:joakim@erdfelt.com">Joakim Erdfelt</a>
  *