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University of Cambridge > Talks.cam > Computer Laboratory Wednesday Seminars > No Fixed Abode: Avoiding IP Address Blocking to Circumvent Censorship
![]() No Fixed Abode: Avoiding IP Address Blocking to Circumvent CensorshipAdd to your list(s) Download to your calendar using vCal
If you have a question about this talk, please contact David Greaves. The Internet enables access to a wide variety of information sources; many countries and organizations, however, try to restrict such access for political and social reasons. People whose access has been censored make use of a variety of circumvention technologies to find the information they need; in turn, the censors use increasingly sophisticated tools to render these technologies ineffective. One of the more powerful tools censors use are blocking IP addresses that are used for circumvention. I will describe two circumvention approaches that are immune to this approach: CensorSpoofer, which fakes the source address of its traffic in order to avoid detection, and Cirripede, which can be deployed within the Internet routing infrastructure to surreptitiously capture and redirects a connection to a covert destination. I will discuss the design of both systems as well as some remaining challenges to their deployment. This talk is part of the Computer Laboratory Wednesday Seminars series. This talk is included in these lists:
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