Last night Twitter suffered the largest security breach in its 14-year-history. Barack Obama, Democratic presidential candidate Joe Biden and billionaires Elon Musk, Jeff Bezos and Bill Gates were among many prominent US figures targeted by hackers. Their accounts all tweeted a link to a Bitcoin account where the hackers promised followers they would pay back double whatever was sent to it. The Bitcoin accounts, which can be watched live by anyone, were shown to be in receipt of over a hundred thousand dollars before the tweets were taken down. Twitter have said it was a “co-ordinated” attack targeting its employees...