Tor (The Onion Router) is a military-grade, secure tool for increasing the privacy and anonymity of your communications; but it's been the subject of plenty of fear, uncertainty and doubt.
The Electronic Frontier Foundation's 7 Things You Should Know About Tor debunks some of the most common myths about the service (which even the NSA can't break) and raises some important points about Tor's limitations.
7 Things You Should Know About Tor [Cooper Quintin/EFF]