Review of Research on Network Flow Watermarking Techniques

In cloud environment, a framework for cross-domain collaborative tracking could find intruders hidden behind autonomous domains by linking these autonomous domains effectively. The autonomous domain in framework could select the appropriate intrusion tracking technology to implement intra-domain tracking according to its own operating rules and communication characteristics. As an active traffic analysis technology, network flow watermarking technology could accurately locate the real positions of intruders hidden behind intermediate hosts (stepping stones) and anonymous communication systems. Furthermore, it has many advantages such as high precise rate, low false alarm rate, short observation time and so on. For these advantages and its high efficiency of intra-domain tracking, it has become the hot spot in academe research in recent years. Therefore, this paper did the following work: (1) research on network flow watermarking technology; (2) conclude the implementation framework of network flow watermarking technology; (3) analyze the principles and implementation processes of several mainstream network flow watermarking schemes; (4) analyze threats to network flow watermarking.