Tougher authentication to become more mainstream Summary: VeriSign chief technology officer Ken Silva expects more consumer businesses to use increasingly stringent ID methods By Tom Espiner | November 6, 2008 -- 13:27 GMT (05:27 PST) Follow @tomespiner Loading... Please wait. Innovations in usability will spur the wider use of the tough authentication measures used by banks and enterprises, VeriSign chief technology officer Ken Silva tells ZDNet UK. Topic: Security Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.