Researchers have found a way to root out identity thieves by analyzing their mouse movements

Identity theft is often a multi-layered process. Once a thief gets one bit of your information, they try to use it to get more. The hackers behind the 2015 data breach of the US Internal Revenue Service (IRS), for example, used personal information they'd previously stolen from thousands of Americans to answer security questions on the IRS website, and in turn get access to their tax returns. The security questions asked about personal details, like, "On which of the following streets have you lived?" and, "What is your total scheduled monthly mortgage payment?" The hackers in the IRS case successfully got through that security measure, but what if the agency had a system in place that could detect whether the person answering the questions really was who they claimed to be?