If you rephrase this question like this, the answer is evident: "Why aren't we using a protocol designed to add encryption to pseudo-devices emulating a real t

If you rephrase this question like this, the answer is evident: "Why aren't we using a protocol designed to add encryption to pseudo-devices emulating a real text terminal device [1] for everything?" 1: http://en.wikipedia.org/wiki/Pseudo_terminal http://en.wikipedia.org/wiki/Pseudo_terminal