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Flash proxies are a new way of providing access to a censorship circumvention system such as Tor. A  is a miniature proxy that runs in a web browser. It checks for clients that need access, then conveys data between them and a Tor relay.

Tor has bridge relays, but in some cases even these can be blocked despite the fact that their addresses are handed out only a few at a time. The purpose of this project is to create many, generally ephemeral bridge IP addresses, with the goal of outpacing a censor's ability to block them. Rather than increasing the number of bridges at static addresses, we aim to make existing bridges reachable by a larger and changing pool of addresses.

"Flash proxy" is a name that should make you think "quick" and "short-lived." Our implementation uses standard web technologies: JavaScript and WebSocket. (In the long-ago past we used Adobe Flash, but do not any longer.)

If your browser runs JavaScript and has support for WebSockets then while you are viewing this page your browser is a potential proxy available to help censored Internet users.

How to Put the Badge on Your Web Page

Copy and paste this HTML into your page. An example is at the bottom of this page.

<iframe src="//crypto.stanford.edu/flashproxy/embed.html" width="80" height="15" frameborder="0" scrolling="no"></iframe>
Flash Proxies
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