This. Embedded guy formerly involved with media devices here, and this is 100% correct. The secrecy involved in content protection is far beyond anything I've

This. Embedded guy formerly involved with media devices here, and this is 100% correct. The secrecy involved in content protection is far beyond anything I've seen while working as a military contractor. At some shops, developers don't even get unlocked bootloaders. You get a device with a bootloader which must be cryptographically unlocked and allowed to boot a limited number of times before needing to be unlocked again. You also have to sign your life away if you ever divulge any confidential details. Chances are though, that you won't even be exposed to the juiciest details because only a select group of senior devs get to see that stuff. Working with content protection companies like NDS or Nagravision is frankly maddening. I know a guy who has his design rejected(because they review your entire system design before certification) and they couldn't even tell him why they rejected his design.