Attendees wear Google Glass while posing for a group photo during the Google I/O developer conference in San Francisco last May. In some cases, governments themselves are responding to privacy worries. Last week, Brazil changed its proposed data-protection law to require that citizen data be hosted within Brazil, prompting complaints from Facebook and Google. Photograph: Justin Sullivan/Getty Images

For businesses, the twin issues of data privacy and protection have never had a higher profile. International data surveillance concerns for individua(...)