David Petraeus, Paula Broadwell Used Electronic 'Dropbox' To Communicate, Official Says

Since David Petraeus resigned as CIA director Friday over his affair with his biographer Paula Broadwell, a flurry of new information has been exposed, including details on the unusual way the two communicated.

The AP reports:

Petraeus and Broadwell apparently used a trick, known to terrorists and teenagers alike, to conceal their email traffic, one of the law enforcement officials said.

Rather than transmitting emails to the other's inbox, they composed at least some messages and instead of transmitting them, left them in a draft folder or in an electronic "dropbox," the official said. Then the other person could log onto the same account and read the draft emails there. This avoids creating an email trail that is easier for outsiders to intercept or trace.

Petraeus isn't the only one under investigation -- Defense Secretary Leon Panetta said the Pentagon is also looking into emails from Gen. John Allen to a Florida woman involved in the case.