Ethereum covert communication method based on whisper protocol

Abstract

The invention discloses an Ethereum covert communication method based on a whisper protocol. The method comprises the steps: coverting and interacting a subject-key pair; encrypting and encoding the message T to be transmitted to obtain T '; randomly generating a statement as an effective carrier payload of a message body in a whisper protocol; carrying out character matching on the T' and a carrier, and recording index information of matched characters; encrypting the index information, and expanding the index information to enable the total length of the message to be a multiple of 256 bytesand serve as an expanded part padding of a message body in a whipper protocol; setting structure information of the whisper letter, setting a theme of the letter as an interactive theme, and encrypting the interactive theme; broadcasting letters to achieve information transmission; enabling the receiver to screen letters through the theme, and decrypt the letters by using the corresponding secretkeys to obtain payload and padding; and decrypting the padding to obtain decrypted information, namely an index, and performing information restoration in combination with the effective carrier. Themethod provided by the invention is high in security, has good anti-interference performance, tamper resistance and detection resistance, and avoids unnecessary consumption when a receiver screens data packets in combination with a theme mechanism of the whisper.

Description

technical field [0001] The invention belongs to the field of information hiding, in particular to an ethernet concealed communication method based on whisper protocol. Background technique [0002] Traditional covert communication still uses a centralized single channel, which makes the communication process susceptible to interference from factors such as the network environment and thus affects the effect of covert communication. In addition, centralized nodes and devices are vulnerable to attacks, which may even cause the communication system to be paralyzed. With its characteristics of decentralization and anti-interference, blockchain has been developed rapidly and widely promoted in recent years. Its characteristics can effectively alleviate the defects of traditional covert communication, and at the same time make the effect of covert communication better. How to effectively apply covert communication to the blockchain has become the focus of researchers. As a wide...

AI Technical Summary

Problems solved by technology

The above method has two deficiencies. First, increasing the number of single transaction address embedding and the number of transaction submissions in a single block does not change the information embedding method of 1bit per address, and does not fundamentally solve the defect of low information embedding rate; The second is that the screening of transactions requires the use of Kleptography technology to try to extract each blockchain transaction until the transaction that can successfully extract the key is found and screened out. The workload is relatively large and the implementation is relatively cumbersome.

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