Blockchain-based data transmission will become a new development direction of data concealment transmission, which is of great significance for developing a secure transmission technology for special applications. To meet the needs of efficient, secure, concealed and stable transmission of confidential information, the transaction data structure of Bitcoin and the location and capacity of potential covert channels are analysed. The data transmission model for covert storage channels based on Bitcoin blockchain is also proposed. It cannot destroy the original transaction format, do not increase the particularity of the transaction content, overcome the defects of the concealed channel characteristics in the existing network environment, ensure that the data is not detected, and protect the sender and receiver of the hidden data transmission.
| Information hidingInformation hiding methods can be divided into three categories according to the different information hiding carriers:This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.