These two links have been posted already on this thread but they answer your question very precisely. https://xkcd.com/538/ https://xkcd.com/538/ https://www.

These two links have been posted already on this thread but they answer your question very precisely. https://xkcd.com/538/ https://xkcd.com/538/ https://www.schneier.com/blog/archives/2015/08/mickens_on_secu.html https://www.schneier.com/blog/archives/2015/08/mickens_on_se...