@inproceedings{d4eabada12e348f3b4478a813cf52005,
title = "CensorSpoofer: Asymmetric communication using IP spoofing for censorship-resistant web browsing",
abstract = "A key challenge in censorship-resistant web browsing is being able to direct legitimate users to redirection proxies while preventing censors, posing as insiders, from discovering their addresses and blocking them. We propose a new framework for censorship-resistant web browsing called CensorSpoofer that addresses this challenge by exploiting the asymmetric nature of web browsing traffic and making use of IP spoofing. CensorSpoofer de-couples the upstream and downstream channels, using a low-bandwidth indirect channel for delivering upstream messages (URLs) and a high-bandwidth direct channel for downloading web content. The upstream channel hides the request contents using steganographic encoding within Email or instant messages, whereas the downstream channel uses IP address spoofing so that the real address of the proxy is not revealed either to legitimate users or censors. We built a proof-of-concept prototype that uses encrypted VoIP for this downstream channel and demonstrated the feasibility of using the CensorSpoofer framework in a realistic environment.",
keywords = "Asymmetric communication, Censorship resistance, IP spoofing, Voice-over-IP",
author = "Qiyan Wang and Xun Gong and Nguyen, {Giang T.K.} and Amir Houmansadr and Nikita Borisov",
year = "2012",
doi = "10.1145/2382196.2382212",
language = "English (US)",
isbn = "9781450316507",
series = "Proceedings of the ACM Conference on Computer and Communications Security",
pages = "121--132",
booktitle = "CCS'12 - Proceedings of the 2012 ACM Conference on Computer and Communications Security",
note = "2012 ACM Conference on Computer and Communications Security, CCS 2012 ; Conference date: 16-10-2012 Through 18-10-2012",
}