Cover your ACKs: pitfalls of covert channel censorship circumvention

Abstract

In response to increasingly sophisticated methods of blocking access to censorship circumvention schemes such as Tor, recently proposed systems such as Skypemorph, FreeWave, and CensorSpoofer have used voice and video conferencing protocols as "cover channels" to hide proxy connections. We demonstrate that even with perfect emulation of the cover channel… (More)
DOI: 10.1145/2508859.2516742

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