A Blockchain Covert Communication Method Based on Derivative Chain

Abstract

The invention relates to a block chain concealed communication method based on a derived chain, belonging to the technical field of block chains. It is enough to ensure that the sender and the receiver can realize covert communication reliably and safely. In the method, the sender and the receiver negotiate to share a pre-shared key, and both parties only need to negotiate once to securely complete multiple covert communications. The sender then embeds the secret information into the Bitcoin transaction. The special transaction and the ordinary transaction are propagated among the nodes in the blockchain network according to the broadcast transmission method of the blockchain network protocol. Finally, the secret information is extracted by the receiver. The method has many advantages such as strong communication concealment, high expansibility and flexibility, strong anti-interference and the like.

Description

technical field [0001] The invention relates to a block chain-based data concealed communication technology, in particular to a derivative chain-based block chain concealed communication method, which belongs to the technical field of block chains. Background technique [0002] Blockchain technology has the characteristics of safety, reliability, network robustness, and decentralization. It has brought about huge and in-depth changes in the fields of finance, technology, medical care, and politics. It has realized a public distributed ledger based on a peer-to-peer network. Think of it as a bulletin board making it a natural broadcast channel. In this communication model, messages are transmitted without a specific destination, thus perfectly hiding the identity of the recipient. In addition, the identity of the sender is also protected due to the anonymity of the blockchain. [0003] On the other hand, the data on the blockchain is open and cannot be tampered with, which ...

AI Technical Summary

Problems solved by technology

[0010] (2) Low transmission efficiency

This results in very low transfer efficiency

[0011] (3) Low economy

Due to the low transmission efficiency, more transactions need to be sent to transmit more content

Although the transfer happens internally, that is, the sender transfers to the address generated by himself, but he still needs to pay the miner nodes in the network the transaction fee for each transaction

So lower transmission efficiency will also lead to low economy

[0012] (4) The concealment of communication behavior is low

The adversary may focus on the transactions containing the OP_RETURN field, because this kind of transaction directly stores and transmits information, which will make the communication behavior easier to discover

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