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InfoResearchPeer-reviewed
A Tor-Based Anonymous Network Covert Channel
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Summary
This paper proposes ANCC, an Anonymous Network Covert Channel that uses Tor's Hidden Service Directories (HSDirs) as intermediate nodes to modulate covert information through the publication and retrieval statuses of hidden services. The authors claim it provides anonymity for the sender, receiver and their communication relationship, with a detection probability below 0.25% against an adversary compromising fifty intermediate nodes. Real-world Tor evaluation reports over 99.6% transmission accuracy and a channel capacity of around 3 Kbps.