A censorship-resistant covert communication protocol based on Web communication behavior
Qing Tan · Journal of the Graduate School of the Chinese Academy of Sciences · 2011
The existing covert communication method based on TCP/IP or HTTP often utilizes characteristics of protocol and hides extra data in specific fields of protocol header.Such a method leaves some obvious signatures.However,timing-based covert communications have some kind of traffic pattern.We propose a censorship-resistant covert communication protocol based on Web communication behavior,which combines dynamic asymmetric communication and Markov model-based Web usage prediction.In this paper we focus on covert communication protocol,prototype system,and security of the protocol.The test results show that our method has high performance and safety.