Covert communication method based on IPID (Internet Protocol Identification) bit delta modulation

Abstract

The invention discloses a covert communication method based on IPID (Internet Protocol Identification) bit delta modulation. By using the method, sensitive information to be transmitted can be concealed in a head part of a network data packet in a computer network environment, so that the sensitive information can not be easily perceived. The method comprises the following steps: when a transmitting party transmits a network data packet, embedding covert information into low-order 4 bits of the IPID according to the corresponding modulation method, wherein high-order 8 bits of the IPID are used for implementing the incremental mode so as to enhance the covertness, and high-order 4 bits of low-order 8 bits are used for implementing synchronization and verification of data communication; and after a receiving party receives the data packet, extracting data of the low-order 8 bits, wherein the high-order 4 bits are used for verification, and the low-order 4 bits are used for the covertness of the data. The method utilizes the self incremental mode during normal communication of the IPID bits, has the advantages of favorable covertness and attack resistance, and is suitable for transmitting sensitive information with a small data size.

Description

technical field [0001] The invention belongs to the technical field of communication and information security, in particular to a secret communication method based on incremental modulation of IPID bit (IP identification, IP stands for Internet Protocol). Background technique [0002] Network covert communication is an interdisciplinary discipline that integrates data communication, computer network, information hiding, information security and other technologies that have emerged in recent years. It refers to using computer network communication data as a carrier to hide secret data in it. The technique of covert communication. Network covert communication can be used to penetrate network security facilities such as access control, firewall and intrusion detection, and implement covert communication that cannot be detected by others. Its outstanding features are high concealment and difficulty in tracking and obtaining evidence. [0003] Network covert communication can be...

AI Technical Summary

Problems solved by technology

Cabuk et al. (5.IP Covert Timing Channels: Design and Detection.Proc.11th ACM Conf.Computer and Communications Security (CCS), Oct.25-292004.) proposed a simple covert communication construction using time interval coding Algorithm, the algorithm implementation is relatively simple but the robustness to network emergencies is poor

Images