Psiphon: Uncensored access to blocked Internet sites

As access to the free flow of information on the web is increasingly critical, and online censorship becoming the order of the day in many conflict areas, tools to help those fighting for free expression around the world is now more than ever before most expedient. Psiphon's censorship circumvention tool gives you access to sites and web services that are blocked or otherwise unavailable through the normal service provider.

Whether it's to access sites that your provider is blocking, or to add a layer of protection when using open Wi-fi services, Psiphon is the best tool for accessing the open Internet.

The Psiphon's circumvention system uses a combination of secure communication and obfuscation technologies (VPN, SSH, and HTTP Proxy) to enable Internet users to securely bypass the content-filtering systems used by governments to impose extralegal censorship of the Internet. It works by the Android or Windows client connecting to servers run by Psiphon.

Psiphon utilizes multiple transport systems, so that if one protocol is blocked by a censor, it will automatically switch to an alternative mechanism.

It is specifically designed to support users in countries considered to be "enemies of the Internet". And it's an open source project, and the source code and design documents can be found on the project page.
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