That particular model doesn't support 'binding nonce generation' which is required to create protected backups but I'm not sure about other Liteon models.
I'm not aware of any technical reason that would prevent Liteon from adding this capability in a firmware update but currently none of the firmwares for that particular model support it.
The 'binding nonce' is a 128 bit key that the drive generates to cryptographically link the data on the disc to that particular disc. It's part of the AACS specs and is intended to prevent 'rollback attacks'.
ImgBurn is capable of determining whether a drive supports 'binding nonce generation' so if you want to find out about a specific drive all you have to do is ask someone that already has one to check it for you.