UltraSurf is a lightweight freeware program designed as an anti-censorship tool. It allows to circumvent firewalls using proxies and employs encryption protocols for privacy. Other applications include protecting your security on public WIFI, hiding your IP address and encrypted communication. When started, UltraSurf automatically finds proxy servers from a range of servers globally and builds a connection through an encrypted tunnel. The software executes without installation from a hard drive or portable media, for example USB drive, memory card or CD, and leaves no registry after shut down. Internet Explorer and Firefox are the currently supported browsers UltraSurf runs through.