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Covert communication method based on data package multilayer packaging

A communication method and data packet technology, which is applied in the field of covert communication based on multi-layer encapsulation of data packets, can solve the problems of covert channel reliability and low bandwidth, and achieve the effect of increasing reliability and transmission bandwidth

Inactive Publication Date: 2015-01-14
SUZHOU INST FOR ADVANCED STUDY USTC
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to propose a covert communication method based on multi-layer encapsulation of data packets, which solves the problems of low reliability and low bandwidth of covert channels based on single-layer protocols, and can make the communication of hidden information better Anti-detection, and has a broad market prospect in the application and popularization of information hiding technology

Method used

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  • Covert communication method based on data package multilayer packaging
  • Covert communication method based on data package multilayer packaging
  • Covert communication method based on data package multilayer packaging

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specific Embodiment

[0051] Sender Alice:

[0052] Step 1: The sender Alice and the receiver Bob agree to use the application layer HTTP connection case encoding method, the lower 16-bit field of the TCP initial sequence number and the lower 8-bit field of the IP ID as the hidden position; the sender performs binary encoding on the hidden information M and Encrypt to get the ciphertext information M k , and then divide the ciphertext information into 8bit, 16bit, and 8bit segments sequentially to generate (M k1 , M k2 , M k3 )sequence.

[0053] Step 2: Alice forges normal data packets at the application layer to hide information. Forge the header of the HTTP message, and insert M in the ciphertext sequence k1 Hidden in the first 8 bits of the connection field, 1 represents uppercase, 0 represents lowercase, encapsulates the data packet, and transmits it to the lower layer;

[0054] Step 3: When the transport layer receives the data packet delivered by the application layer, it will hide the ...

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Abstract

The invention discloses a covert communication method based on data package multilayer packaging. According to the covert communication method based on data package multilayer packaging, the redundancy of a TCP / IP family is analyzed, covert information is decentralized and hidden in an HTTP of an application layer, a TCP of a transmission layer and an IP of a network layer, and therefore the reliability and the transmission bandwidth of a covert channel are greatly improved.

Description

technical field [0001] The invention relates to the technical field of information hiding, in particular to a secret communication method based on multi-layer encapsulation of data packets. Background technique [0002] As an emerging information security technology, information hiding has developed rapidly in recent years. It hides the secret information in the public carrier information, and the secret information is sent out through the carrier information to be detected by the opponent. The hidden communication implemented by information hiding technology has better security and concealment, and is used in military, commercial confidential communication and other fields. [0003] With the vigorous development of the Internet, TCP / IP protocol family messages widely exist in the massive data packets of the network, which provides the basis for the TCP / IP protocol itself as a carrier of hidden information. Moreover, due to the fixed format and redundancy of the message st...

Claims

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Application Information

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IPC IPC(8): H04L29/06
CPCH04L63/0428H04L69/16
Inventor 黄刘生沈瑶陆潇榕杨威陈志立
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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