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Anonymity networks like Tor significantly enhance online privacy but arevulnerable to correlation attacks by state-level adversaries. While covertchannels encapsulated in media protocols, particularly WebRTC-basedencapsulation, have demonstrated effectiveness against passive trafficcorrelation attacks, their resilience against active correlation attacksremains unexplored, and their compatibility with Tor has been limited. Thispaper introduces TorKameleon, a censorship evasion solution designed to protectTor users from both passive and active correlation attacks. TorKameleon employsK-anonymization techniques to fragment and reroute traffic through multipleTorKameleon proxies, while also utilizing covert WebRTC-based channels or TLStunnels to encapsulate user traffic.

TorKameleon: Improving Tor's Censorship Resistance with K-anonymization and Media-based Covert Channels