Hidden communication message security coding method and system based on block chain, and medium

Abstract

The invention provides a hidden communication message security coding method and system based on a block chain, and a medium, and the method comprises the following steps: a transmitting end carries out the first hidden processing of to-be-transmitted hidden data, and obtains a hidden message group; a first smart contract is generated on the initial block chain node based on a transaction event that the sending end transmits the hidden message group to the initial block chain node; the receiving end gains the required hidden message group according to the identification code; a transaction event of the hidden message group is acquired from a corresponding node in a block chain based on a receiving end to generate a second smart contract; the supervision terminal obtains the first intelligent contract and the second intelligent contract, performs validity check on the first intelligent contract and the second intelligent contract, and sends a sending terminal secret key corresponding tothe hidden message group to a receiving terminal; and the transaction event is stored in a block chain account book. According to the invention, safe and reliable communication with high efficiency,expandability, large transmission quantity and good concealment can be realized.

Description

technical field [0001] The present invention relates to the technical field of covert communication, in particular, to a block chain-based covert communication message security coding method, system and medium. Background technique [0002] In traditional covert communication, there are problems such as covert channels are easy to be detected, covert participants are easy to be exposed, covert transmission is poor in robustness, and it is difficult to realize group covert transmission. Outstanding advantages include: 1) stable decentralized self-organizing network; 2) non-directional information transmission mechanism; 3) anonymous account mechanism. Blockchain uses transactions to build covert channels and transmit covert data information, which has important application value for the development of covert communication technology in the communication field. [0003] At present, people have made a series of achievements in the research direction of anonymous communication ...

AI Technical Summary

Problems solved by technology

[0009] (3) Anonymous communication based on flooding algorithm is a new research hotspot in the field of anonymous communication transmission recently. It is mainly based on flooding, epidemic and other flooding algorithms to realize anonymous communication. It is still in the laboratory research stage, and there is no mature anonymous communication that is actually deployed. Communication Systems

However, the main challenge faced by the anonymous communication system based on the flooding algorithm is that the system will generate a large amount of network transmission traffic, which requires a large network bandwidth; at the same time, in the current state, the stability and reliability of the system algorithm are not enough

[0010] To sum up, although traditional anonymous communication technology can achieve a certain degree of communication concealment, it has shortcomings such as directional sending and explicit receiving, which lead to: 1) Covert channels are easy to be detected, and it is easy for adversaries to monitor network traffic and analyze The traffic characteristics to detect covert channel

2) The hidden participants are easily exposed. Once the covert channel is detected by the adversary, the identity of the person participating in the covert transmission will be easily exposed.

3) The robustness of covert transmission is poor, and factors such as network delay and adversary interference cause the receiver to make mistakes when extracting covert information

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