I think the term "capability based" is explained well enough in the talk "Dive into Magenta – fuzzing Google’s new kernel" (https://youtu.be/aYZCiLI-LZM?t=18m9s

I think the term "capability based" is explained well enough in the talk "Dive into Magenta – fuzzing Google’s new kernel" (https://youtu.be/aYZCiLI-LZM?t=18m9s https://youtu.be/aYZCiLI-LZM?t=18m9s). Highly recommend it.