The EnableChecksum setting is used to determine whether a checksum will be added to generated Application Server URLs.
If set to true, you must also enter a checksum key value in the ChecksumKey setting, which is used to create the checksum value in the URL. When a user attempts to navigate to an App Server URL, if the value does not match the Checksum Key, the user is presented with an error. This is to prevent users from modifying query strings and accessing files they should not access.
When set to false, no checksum is created.