09/11/2010 05:12 am ET Updated May 25, 2011

Dissidents Can Use Twitter, Flickr To Send Secret Messages

In an attempt to make it easier for dissidents in countries such as China and North Korea to communicate without fear of government sanctions, researchers at Georgia Tech have developed software that can hide information inside messages posted to Twitter and other social networks, as well as in images that can be uploaded to photo-sharing sites such as Flickr and Picasa.