Some alternatives here: http://en.wikipedia.org/wiki/Security_focused_operating_system
Some news: http://politics.slashdot.org/story/09/12/05/2044243/Iranian-Crackdown-Goes-Global?from=rss&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+Slashdot/slashdot+(Slashdot)