Psiphon
| Psiphon
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| Basic data
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| developer | Citizen Lab |
| Publishing year | 2006 |
| Current version |
3.0 ( December 18, 2016 ) |
| operating system | Windows , Android , ( Mac / Linux versions in progress) |
| category | Anti-internet censorship |
| License | GPL ( free software ) |
| German speaking | Yes |
| psiphon.ca | |
Psiphon is a free software to circumvent Internet censorship by so-called social networks ( social networks ). It is a project by the University of Toronto , Canada, under the direction of Professor Ronald Deibert , Director of the Citizen Lab . This is intended to enable Internet users to bypass various censorship and content filter systems.
Citizen Lab relies on "trustworthy" contacts and hopes to be able to gain as many users as possible. In contrast to the publicly accessible IP addresses of large servers, which are relatively easy to block, the Psiphon computers of private users function as independent access points whose IP address is known only to a small group. This detour gives users in the countries affected by content barriers uncensored access to the Internet. The data retrieved is transmitted in encrypted form. B. should run over international networks for financial transactions. It should therefore be difficult for the state censorship to filter out the relevant data from this data traffic.
The application program does not have to be installed on the user's computer, but can be called up via a web-based log-in function. The computers of users who make their devices available for this purpose function as censorship-free proxy portals . The Psiphon user in an environment affected by censorship ultimately only has to connect to a Psiphon user in a free country in order to get unhindered access to the Internet.
Since December 1st 2006 the software (only necessary for the voluntary providers) can be downloaded. It was released under the GNU General Public License (GPL).
Psiphon is part of the CiviSec project at the Munk Center for International Studies at the University of Toronto . It is supported by the Open Society Institute , among others . At the 35C3 congress in Leipzig there was an overview lecture of around one hour by one of the developers under the title Cat and Mouse: Evading the Censors in 2018 .