Network Covert Channel Technique Based on IP Header Option
Wang Song-he · Jisuanji gongcheng · 2009
In order to extend and diversify the carrier of protocol steganography, the possibility of concealing messages in IP option is studied.After analyzing the standard of network protocol, four new covert channels can be established in IP header through rewriting of option's pointer field.The principles of covert channels are discussed and channels which can avoid router to overwrite are implemented at Internet circumstance by simulation.The countermeasure to steganalysis which should be taken is analyzed with newest development of network covert channel's detection.