Absolutely! You don’t get the former (keys) because you can’t get the later (secure render stack) as a “normal” Linux user.

That said, one thing you got technically(!!) wrong:

You can get a secured (stack) and certified (keys) Linux, if you close it up properly… Source: I worked a little bit on one of those, and yes, I’m ashamed, and yes, I’m expecting a bit of hell time for it… Was a fun task though.