I'm sorry, I did not mean that, misunderstanding twice on my part. I meant that you can have a SAS SPL OS and have it safe too. Theseus Book simply states that

I'm sorry, I did not mean that, misunderstanding twice on my part. I meant that you can have a SAS SPL OS and have it safe too. Theseus Book simply states that relying on hardware for data isolation have proven a deficient approach, given the existence of such attacks.