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The Psiphon 3 Circumvention System is a relay-based Internet censorship circumventer.
The system consists of a client application, which configures a users computer to direct Internet traffic; and a set of servers, which proxy client traffic to the Internet. As long as a client can connect to a Psiphon server, it can access Internet services that may be blocked to the user via direct connection.
Automatic discovery. Psiphon 3 clients ship with a set of known Psiphon servers to connect to. Over time, clients discover additional servers that are added to a backup server list. As older servers become blocked, each client will have a reserve list of new servers to draw from as it reconnects. To ensure that an adversary cannot enumerate and block a large number of servers, the Psiphon 3 system takes special measures to control how many servers may be discovered by a single client.
Mobile ready. A Psiphon 3 client Android app will be available as part of the beta launch, and other mobile platforms are in the works.
Zero install. Psiphon 3 is delivered to users as a minimal footprint, zero install application that can be downloaded from any webpage, file sharing site or shared by e-mail and passed around on a USB key. We keep the file size small and avoid the overhead of having to install an application.
Custom branding. Psiphon 3 offers a flexible sponsorship system which includes sponsor-branded clients. Dynamic branding includes graphics and text on the client UI; and a region-specific dynamic homepage mechanism that allows a different home page to open depending on where in the world the client is run.
Chain of trust. Each client instance may be digitally signed to certify its authenticity. Embedded server certificates certify that Psiphon servers the client connects to are the authentic servers for that client.
Privacy. Psiphon 3 is designed to respect user privacy. User statistics are logged in aggregate, but no individual personally identifying information, such as user IP addresses, are retained in PsiphonV log files.
Agile transport. Psiphon 3 features a pluggable architecture with multiple transport mechanisms, including VPN and SSH tunneling. In the case where one transport protocol is blocked by a censor, Psiphon automatically switches over to another mechanism.
|27||1,567||Psiphon Inc. <img src="http://www.oldergeeks.com/downloads/gallery/thumbs/Psiphon3_th.png"border="0">||May 11, 2017 - 11:53||v3||5MB||EXE||, out of 1 Votes.|
|56Kbit Modem: 12m 29s · 256Kbit: 2m 44s · 1Mbit: 41s · 5Mbit: 9s|
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