Counterfeit TCP covert communication method based on SYN-ACK dual-server rebound pattern

Abstract

The invention discloses a counterfeit TCP covert communication method based on an SYN-ACK dual-server rebound pattern. A covert information sending end is in communication with a covert information receiving end through a rebound server A or a rebound server B. A three-way handshake principle of connection is set up through a TCP, and covert information is embedded into a sequence number domain of the TCP and an acknowledgement number domain through a counterfeit source IP address and sent to a target end through rebound of the rebound server A. Meanwhile, the covert information feeds information back to the covert information sending end according to the modification operation of a sequence number and the modification operation of an acknowledge number and through the rebound server B, and the loss detection of the target end and the retransmission timeout of the target end are achieved.

Description

technical field [0001] The invention belongs to the technical field of information hiding, and in particular relates to a pseudo-TCP reliable covert communication method based on a SYN-ACK double-server bounce mode. Background technique [0002] The rapid development of modern network technology makes the transmission of information faster and more convenient, but the transmission security of a large amount of information, especially related to national security, commercial secrets and personal privacy information, has attracted more and more attention. Once this information is leaked, it will bring Serious consequences. In the past, encryption technology was often used to transmit such information, but encryption technology will arouse the attacker's interest in cracking. And with the development of computer hardware, the cracking speed is much faster than before. Information hiding technology provides a good solution to this kind of problem. Information hiding is a tech...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a pseudo-TCP reliable covert communication method based on SYN-ACK double server rebound mode, solve most of the existing problems of unreliable and low security based on TCP / IP protocol covert communication, and achieve the purpose at the same time The orderly reorganization, loss detection and timeout retransmission mechanism of terminal concealed information

Images