Terrorist groups, which for years have used the Internet and its various tools to organize and communicate, are paying more attention to addressing security and privacy concerns similar to those of other Web users, counterterrorism experts say. The Internet has long been a convenient gathering place for radical Islamists advocating violence against Western influences, known as jihadists. Through online chat, e-mail and Web postings, communities of people have relied on one another for advice, political debate, even movie reviews and biographical information on suicide bombers and religious leaders. Full Story