The Internet has become so economically important that few countries can afford to cut off access altogether. Instead, repressive regimes allow 'Net access, but try to block individual websites they don't want their populations to see. Some users, aided by allies in the West, use circumvention technologies like Web proxies or TOR to access forbidden information. This has led to a long-running cat-and-mouse game in which censorship opponents establish new proxies while censors race to identify and block them.
Researchers at the University of Michigan have developed technology that they hope can decisively tilt the playing field toward free speech. Their system, called Telex, is an "end-to-middle" proxy scheme. That is, rather than explicitly directing traffic to a proxy server, users "tag" traffic they want proxied and transmit it to an ordinary website that happens to have a Telex-enabled router between it and the user. The router recognizes the tag and silently redirects the packets to their real destination.
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