Steganography in data networks based on PDU retransmission
Gabriel Bugár, Dušan Levický · 2016
The aim of this work is to present a real and useful application of steganography systems in data communication networks. Different from all the previous work analyzing the traditional steganography system, we introduce the possibility of the TCP protocol mechanism usage in steganography based on intentionally triggered protocol data unit (PDU) retransmission. It describes how to create a subliminal channel in the network and its usage for steganography purposes, so called network-based steganography, which is relatively a new research object in the field of information hiding. We analyzed the way of creating a hidden steganography channel via PDU retransmission in a real network. The achieved results of the proposed method are in practical part and in the end the recovered qualitative benefits of simulations are situated.