Interesting development of how external issues (govt & privacy) can bring competitors to the table). Yahoo said Thursday it will join an effort by rival Google to create a secure email system by next year that could make it nearly impossible for hackers or government officials to read users' messages. Even the email providers themselves won't be able to decrypt messages. If successful, it would mark a first step in bringing advanced privacy technology to a widely used consumer service. It is also a stark example of how tech giants are rethinking their business plans after Edward Snowden began leaking secrets from the National Security Agency last year. Until February, Yahoo didn't have a C-suite level executive dedicated to information security.