Implementation of Secret Communication with Covert Channels in Network Traffic
Jianhua Wang · 2009
Secret communication is to hide the existence of communication.This work relates network security and privacy with data hiding techniques,focusing on secret communication using covert channels in network traffic.The framework,classification and evaluation of covert channels and design issues in secret communication protocols were investigated.Covert channels were divided into structure-mode,behavior-mode and content-mode.The comparison of different channels illustrates that channels in structure-mode and behavior-mode are generally more apt to be eliminated while those in content-mode are more reliable and of high-bandwidth.A combination of different kinds of channels should be appropriate for developing secret communication protocols.