Passwords with a 60-second shelf life Summary: At the RSA Conference in San Francisco, CNET's Brian Cooley sees a new technology that changes passwords once a minute on devices including PDAs, cell phones and wristwatches. April 15, 2003 -- 21:22 GMT (14:22 PDT) Loading... Please wait. Topic: Tech Industry Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.