Rumsfeld sums up the problem rather succinctly: http://www.brainyquote.com/quotes/quotes/d/donaldrums148142.html http://www.brainyquote.com/quotes/quotes/d/dona

Rumsfeld sums up the problem rather succinctly: http://www.brainyquote.com/quotes/quotes/d/donaldrums148142.html http://www.brainyquote.com/quotes/quotes/d/donaldrums148142.... I think Netflix and its Chaos Monkey software is a very effective way of dealing with the 'unknown unknowns' of distributed systems. Although obviously this approach doesnt work with cryptography systems. They call it Chaos Monkey (opposed to Genius Monkey) for a reason.