Game consoles have shown us how to raise the barrier to entry: only run signed code by default, and require a "license to code". The security class I was in las

Game consoles have shown us how to raise the barrier to entry: only run signed code by default, and require a "license to code". The security class I was in last semester discussed this; it may not catch on for consumer PCs, but it's not inconceivable that it could be the model in the business world.