Selling IP and Protecting against reselling?

I'm looking to selling some of my custom hardware I've designed in Verilog/VHDL, but I also want to protect my IP from being resold. Sure I can have a license agreement, but that doesn't prevent anyone from altering the code a bit, and using the ideas to resell them. Is there a way I can encrypt the... show more I'm looking to selling some of my custom hardware I've designed in Verilog/VHDL, but I also want to protect my IP from being resold. Sure I can have a license agreement, but that doesn't prevent anyone from altering the code a bit, and using the ideas to resell them. Is there a way I can encrypt the code so the end user can have all the functionality behind the design? Who do I go through? Most of my designs by Altera, in Quartus II software.
2 answers 2