What's a Chinese netizen to do if he happens to find the BBC a
legitimate news outlet but his government disagrees? Countries like
China and Saudia Arabia regularly censor the Internet, which means that
some citizens in those countries are regularly trying to evade the
government blocks. Other countries like the UK intend to impose
draconian imprisonment for viewing dangerous pictures. Come December 1,
Internet users will have a new tool
psiphon.
psiphon is currently in development at the Citizen Lab, a part of the
Munk Centre for International Studies at the University of Toronto. The
project's goal is to allow surfers in countries with censored 'Net
access to connect to web proxies posted in uncensored countries. Unlike
other anonymizing or proxy services, psiphon relies on "networks of
trust" to distribute the proxy addresses, hopefully making psiphon nodes
more difficult to find and block.
Here's how it works: "psiphonodes" are set up by users in uncensored
countries, who then distribute the site address only to users in
censored countries whom they actually know or trust. When those users
visit the psiphonode, they log in over a secure HTTP connection and a
small bar appears in the top of their browser window (no software is
downloaded or installed). Web addresses are entered into this bar and
routed through the psiphonode like a regular web proxy. The entire
session is encrypted.
To make the system difficult to shut down, each psiphonode is run
independently. If one is blocked, all the others remain live. And
because the system is based on personal connections rather than large
lists, each node should be more difficult to find. Should a censor
notice the unusually long encrypted session and investigate the IP
address, he will find only an innocous web page. To log in to psiphon,
each user receives a specialized URL; viewing the root page reveals
nothing, not even the login screen.
Versions of the software will be available for both Windows and
Linux, with a Mac version to follow. psiphon will be free and
open-source (it's offered under the GPL), but in its initial incarnation
will only support Web browsing; VoIP and IM usage will not be covered.
psiphon is only the latest project to offer a way around the censors;
earlier projects like Peacefire
attempted to do the same thing.