Tor is a system intended to enable online anonymity. Tor client software routes Internet traffic through a worldwide volunteer network of servers in order to conceal a user’s location or usage from someone conducting network surveillance or traffic analysis. Using Tor makes tracing Internet activity, including “visits to Web sites, online posts, instant messages and other communication forms”, to the user more difficult. It is intended to protect users’ personal freedom, privacy, and ability to conduct confidential business, by keeping their internet activities from being monitored. The software is open-source and the network is free of charge to use.