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ScrambleSuit: A Polymorphic Network Protocol to Circumvent Censorship
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science. (PriSec)
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science. (PriSec)ORCID iD: 0000-0001-6459-8409
Upper Austria University of Applied Sciences.
2013 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Deep packet inspection technology became a cornerstone of Internet censorship by facilitating cheap and effective filtering of what censors consider undesired information. Moreover, filtering is not limited to simple pattern matching but makes use of sophisticated techniques such as active probing and protocol classification to block access to popular circumvention tools such as Tor. In this paper, we propose ScrambleSuit; a thin protocol layer above TCP whose purpose is to obfuscate the transported application data. By using morphing techniques and a secret exchanged out-of-band, we show that ScrambleSuit can defend against active probing and other fingerprinting techniques such as protocol classification and regular expressions. We finally demonstrate that our prototype exhibits little overhead and enables effective and lightweight obfuscation for application layer protocols.

Place, publisher, year, edition, pages
ACM Press, 2013.
Keyword [en]
Tor, bridge, pluggable transport, active probing, traffic analysis, censorship, circumvention
National Category
Computer Systems
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:kau:diva-29031OAI: oai:DiVA.org:kau-29031DiVA: diva2:647984
Conference
Workshop on Privacy in the Electronic Society, Berlin 4 november
Available from: 2013-09-13 Created: 2013-09-13 Last updated: 2017-12-06Bibliographically approved

Open Access in DiVA

wpes2013(522 kB)59 downloads
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Type fulltextMimetype application/pdf

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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Output format
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