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A secret information transmission method and system based on tcp and udp

A technology of secret information and transmission method, which is applied in the direction of transmission system, digital transmission system, security communication device, etc. It can solve the problem of fixed rewriting position, improve concealment and robustness, avoid communication load, and transmit easily and efficiently Effect

Active Publication Date: 2022-04-26
江苏新视云科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specificity of the storage covert channel is strong, and the rewriting position is relatively fixed, so the detection method for them is relatively easy

Method used

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  • A secret information transmission method and system based on tcp and udp
  • A secret information transmission method and system based on tcp and udp
  • A secret information transmission method and system based on tcp and udp

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Embodiment Construction

[0020] The following technical solutions of the present invention in conjunction with the accompanying drawings will be further described.

[0021] Figure 1 The general flowchart of the information hiding method of the present invention. The transport layer protocol TCP and UDP packets are used to construct a covert channel, and the sender goes through two processes of encryption and encoding, adjusts the packet transmission sequence of TCP and UDP according to the secret information ciphertext S, so as to complete the embedding of the secret information ciphertext S, and the secret information is transmitted together with the TCP and UDP packets. The recipient reverse decodes and decrypts the secret information plaintext B, and leaves it to the channel monitor for judgment and processing.

[0022] The specific implementation steps are as follows:

[0023] Step 1: Create a hidden channel:

[0024] Due to the wide range of applications of the TCP protocol, many application layer ...

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Abstract

The invention discloses a secret information transmission method based on TCP and UDP and its system, comprising the following steps: (1) establishing a covert channel; (2) encrypting the plaintext B of the secret information to be sent to generate a group secret information ciphertext S ; (3) Embed the secret information ciphertext S into the TCP and UDP sending window sequence by encoding, so that it is transmitted together with the TCP and UDP data packets; (4) Reverse the received TCP and UDP message sequence Decode and decrypt to obtain the plaintext B of the secret information. The present invention introduces information coding technology into the transmission sequence of the transport layer protocol TCP and UDP data packets to construct a hidden channel, which makes the transmission of secret information more convenient and efficient, not only avoiding the extra communication load brought to the existing TCP connection channel, but also The information verification mechanism is introduced to further improve the concealment and robustness of secret information transmission.

Description

Technical field [0001] The present invention relates to a secret information transmission method and a system thereof, in particular to a secret information transmission method and system based on TCP and UDP. Background [0002] Covert communication is a technology that hides the information that needs to be secretly transmitted into some carrier information to realize the protection of secret information, and is an important branch of information security. The ease of use and ubiquity of the concealed channel is a key factor in putting the concealed channel technology into practical application. A hidden channel is easy to apply from theory to practice if the host channel can be easily found, and the number of host channels that can be selected is large. Due to the wide range of applications of the TCP protocol, many application layer services are based on the TCP protocol. The TCP protocol is an end-to-end protocol that provides connection-oriented services, and in communicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/40H04L69/16
CPCH04L63/0428H04L63/065H04L63/166H04L69/16
Inventor 翟江涛崔永富林鹏石怀峰张艳艳付章杰
Owner 江苏新视云科技股份有限公司
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