Description
It is not possible to generate the .pof/.jic programming file for AS x4 mode with encryption enabled in the Quartus® II software when using the quartus_cpf command.
Resolution
If you need both AS x4 and encryption for the .pof/.jic programming file, it can be generated by using the Convert Programming File GUI in the Quartus II software.
The quartus_cpf command is scheduled to be enhanced in a future version of the Quartus II software to allow generation of .pof/.jic programming files for AS x4 with encryption enabled.