CIA

Few cases better underscore the need for digital security among journalists. On Tuesday, ex-CIA officer John Kiriakou pleaded guilty to leaking the identity of another CIA operative to Matthew Cole, a journalist formerly with an ABC News investigative team. In a 2007 interview with ABC, Kiriakou became the first CIA official to confirm that waterboarding had been used on Al-Qaeda suspects.

A reporter's right to protect confidential sources, a topic of debate both in the U.S. and internationally, will undergo another round of legal scrutiny after federal prosecutors formally appealed a decision shielding journalist James Risen's sources in a CIA leak case.