psiphon is a censorship circumvention solution that allows users to access blocked sites in countries where the Internet is censored. psiphon turns a regular home computer into a personal, encrypted server capable of retrieving and displaying web pages anywhere

psiphon operates through networks of trust. There are psiphon providers who install and administer a psiphon server (psiphonode) in an uncensored country, and psiphon users (psiphonites) who login and access the server from a country that censors the Internet.

psiphon encryption provides strong protection against electronic eavesdropping. However, there is a known attack that attempts to trick users into accepting a forged certificate (see 'Man-in-the-middle attack' below). If psiphonites follow instructions provided, regarding certificate fingerprint validation, this attack can be averted.

psiphon is free.