There’s a great deal more hidden inside the modern digital image. They say a picture is worth a thousand words. Hidden information inside digital photos can reveal much more than photographers and their subjects bargain for. John McAfee, founder of the eponymous antivirus software was tracked down in 2012 and yet without them realising, location data embedded in the photo inadvertently revealed that McAfee was in Guatemala. Could your own photos be sharing more details with the world than you realise too?