I hear an engineer behind me say "never ever rely on software" and perhaps in context he is correct. But if you can't rely on software for anything, then there's very little you can do in this online world. Software is tracking your pay and the bank account it goes into. Software helped designed your car and the roads on which you drive it. Software counted up the total of the groceries you purchased this week and software gave you the cash, one way or another.
If software is so very unreliable, then we have a lot of double-checking to do, and it will occupy most of our days. Once we trust software (usually once it has proven itself reliable) then we can stop double-checking its results and get on with our lives. Those lives, incidentally, will probably require more software to keep track every year.
Mokalus of Borg
PS - There's another kind of "trusted" computing that's best left unexplored.
PPS - It doesn't mean that you trust your systems, but the other way around.
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