It looks like Quartus Prime Pro supports IEEE encrypted verilog files but no Stratix devices and only Arria 10 and Quartus Prime supports most devices but no IEEE encryption?

Which is correct, for std version, use amplic tools for encryption. 10. Q: How do I purchase a license with netlist encryption capabilities? A. Please contact your local sales for more purchase information. https://www.intel.com/content/www/us/en/programmable/downloads/download/licensing/q-and-a.html?wapkw=license+faq+altera