Thought experiment: Have, like in aviation, units built of two separate, but parallel architectures designed and built by unrelated, independent manufacturers with software written by independent teams in different languages and deploy them redundantly. (E.g., Airbus does this.) Now you have cranked up the cost for any manipulations to the requirements of successfully attacking two separate architectures in the same realtime timeframe, maybe at several redundant units at once. Leaving the message path. So you're still screwed. (Simply, because the win to cost ratio may be near to infinity. If we have concerns regarding personal messages, how could we possibly guarantee for this one?) Enter the paper trail and printers. – However, does anyone remember the Xerox scanner debacle of misarranged and falsely duplicated data by the compression algorithm, or the debates about Obama's birth certificate (due to image portions duplicated by the compression algorithm)? Things like these went unnoticed for years.<p>What we may learn from this, a) there's no perfect system involving software, b) if we do not want to invest as much in democracy as we do in shuffling around a few people by aviation, how may we be worth it? Anyway, voting methods shouldn't be about cost reduction.