Sure, but what code is the sd card running? All sd cards have drm protection (which interestingly, hasn't been cracked) and memory that isn't user accessible (

Sure, but what code is the sd card running? All sd cards have drm protection (which interestingly, hasn't been cracked) and memory that isn't user accessible (see wikipedia), as part of the standard. And they are riddled with security vulnerabilities that allow remote code execution on them ( see http://www.bunniestudios.com/blog/?p=3554 http://www.bunniestudios.com/blog/?p=3554). I mean that's a level of paranoia I usually don't hold to, but if you are going to go all out, I have to wonder if there is a more secure form of non volatile memory.