Most of are familiar with CAPTCHA, which stands for Completely Automated Public Turing test to tell Computers and Humans Apart. You sign on (or in) to something and you then are confronted with weird letters or numbers or some other puzzle requiring you to slide one image on top of another.CAPTCHA was first coined in 2003, although other attempts to keep bots from imitating humans have a longer lineage. The unanticipated problem now is that the rise of artificial intelligence is making machines capable of passing these tests. If a machine can pass a test, one seemingly logical solution would...