A High-Tech War on Leaks

It used to be that journalists had a sporting chance of protecting their sources. The best and sometimes only way to identify a leaker was to pressure the reporter or news organization that received the leak, but even subpoenas tended to be resisted. Today, advances in surveillance technology allow the government to keep a perpetual eye on those with security clearances, and give prosecutors the ability to punish officials for disclosing secrets without provoking a clash with the press