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SIGCOMM
2010
ACM

Circumventing censorship with collage

13 years 11 months ago
Circumventing censorship with collage
Oppressive regimes and even democratic governments restrict Internet access. Existing anti-censorship systems often require users to connect through proxies, but these systems are relatively easy for a censor to discover and block. We explore a possible next step in the censorship arms race: rather than relying on a single system or set of proxies to circumvent censorship firewalls, we use the vast deployment of sites that host user-generated content to breach these firewalls. We have developed Collage, which allows users to exchange messages through hidden channels in sites that host user-generated content. To send a message, a user embeds it into cover traffic and posts the content on some site, where receivers retrieve this content. Collage makes it difficult for a censor to monitor or block these messages by exploiting the sheer number of sites where users can exchange messages and the variety of ways that a message can be hidden. We have built a censorship-resistant news reader u...
Sam Burnett, Nick Feamster, Santosh Vempala
Added 06 Dec 2010
Updated 06 Dec 2010
Type Conference
Year 2010
Where SIGCOMM
Authors Sam Burnett, Nick Feamster, Santosh Vempala
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