Currently one of the most read articles on Forbes.com, this story tells how the Department of Homeland Security was forced, under the Freedom of Information Act, to release keywords they use to monitor social media websites for domestic and foreign terrorism.

In a story appearing earlier today on the U.K’s Daily Mail website, it was reported that the DHS has been forced to release a list of keywords and phrases it uses to monitor various social networking sites. The list provides a glimpse into what DHS describes as “signs of terrorist or other threats against the U.S.”

The list was posted by the Electronic Privacy Information Center who filed a request under the Freedom of Information Act, before suing to obtain the release of the documents. The documents were part of the department’s 2011 ’Analyst’s Desktop Binder‘ used by workers at their National Operations Center which instructs workers to identify ‘media reports that reflect adversely on DHS and response activities’.

The information sheds new light on how government analysts are instructed to patrol the internet searching for domestic and external threats. The Daily Mail’s article noted the Electronic Privacy Information Center wrote a letter to the House Homeland Security Subcommittee on Counter-terrorism and Intelligence, describing it’s choice of words as ‘broad, vague and ambiguous’.

Reading is somewhat more technical in nature than expected. Read the entire article for the list of categorized keywords.