Covert communication method based on block chain ring signature

Abstract

The invention discloses a covert communication method based on a block chain ring signature. The method comprises the following steps: S1, obtaining long-term public keys and initial symmetric keys of a sender and a receiver; s2, constructing a ring signature transaction as a confidential message carrier; s3, the sender broadcasts the constructed ring signature transaction; and S4, the receiver checks the transaction pool and analyzes the confidential message. The method has the advantages of being simple in principle, easy and convenient to operate, wider in application range, higher in processing speed, higher in safety and the like.

Description

technical field [0001] The invention mainly relates to the technical field of network security, in particular to a covert communication method based on a blockchain ring signature. Background technique [0002] With the development of network technology, more and more attention has been paid to the security and privacy of data transmission, which also provides the premise and foundation for the study of covert communication. Compared with single encrypted communication, "covert communication" also conceals the fact that both parties communicate data. [0003] Existing traditional covert communication methods often use redundant fields of data packets as carriers, embed encrypted confidential information into these carriers, and then use traditional network channels for transmission. However, these traditional methods still have risks such as malicious tampering of data packets. Therefore, considering the immutability of the blockchain, people's focus is gradually turning t...

AI Technical Summary

Problems solved by technology

[0006] (1) The risk of identity disclosure of both parties in concealed communication caused by the incomplete anonymity of the blockchain address;

[0007] (2) The risk of statistical cryptanalysis caused by the fixed shared key used for encryption

[0013] In the above technical scheme, the solution to problem (1) is to generate a new random sender address before each transmission, but this will cause a large number of token balances to be 0; the address that initiates a single transaction is different from the normal address There are still discrepancies in the logic; at the same time, the difficulty of public and private key management has increased

[0014] It can be seen from the above that the traditional technology does not solve the problems of the covert communication method based on the blockchain, and a new technology is urgently needed to form a better solution.

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