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I've used Altera's AMPcrypt tool for that. you only have to encrypt your top level entity, and then create the .qxp file.
you'll need to contact Altera directly to get that tool.
By the way I think I've heard that the new Verilog \ VHDL versions include a built in encryption attribute, but I haven't tried it myself, and I don't know how much Quartus support there is.
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I'am very interrested to try this tool ("AMPcrypt") but unfortunately i dont't find any informations on Altera's web site.
Is this tool free ?
Can you give me a download link or informations ?
Best regards.
Honored Contributor
