There's no way to have a perfectly secure system if the hardware is in someone else's hands. Period. See http://en.wikipedia.org/wiki/Blue_Pill_(software) http:

There's no way to have a perfectly secure system if the hardware is in someone else's hands. Period. See http://en.wikipedia.org/wiki/Blue_Pill_(software) http://en.wikipedia.org/wiki/Blue_Pill_(software) for one reason why.