No such animal. Without a physical proof of voting that is able to be scrutinised by everybody concerned, it can't be done. All jokes aside, the old-fashioned

No such animal. Without a physical proof of voting that is able to be scrutinised by everybody concerned, it can't be done. All jokes aside, the old-fashioned paper and pencil ballot is probably the best of all the bad voting methods. The best is of course a 'show of hands' and a verified physical count of those hands.