Are you one of the 50 million users of Instagram, the photo-sharing service bought by Facebook in April for $1 billion? If so you need to look out for an Instagram update to fix a vulnerability that has just been published by Spanish security researcher Sebastián Guerrero. This vulnerability, which Guerrero has dubbed the "Friendship

…Andrew Lee conducted a fun but disquieting thought experiment in the course of an amusing and informative presentation on user education at the recent Virus Bulletin Seminar…