A Derivative Matrix-Based Covert Communication Method in Blockchain

The data in the blockchain cannot be tampered with and users are anonymous, which enables to a natural carrier for covert communication. However, existing methods of communication suffer from predefined channel structure, capacity single transaction is not high, fixed behaviors will lower concealment channel. Therefore, this paper proposes derivation matrix-based method blockchain. It uses dual-key derive two types addresses then constructs an address matrix by dividing into multiple layers make full use redundancy addresses. Subsequently, solve problem lack caused behaviors, divide rectangular square blocks overlapping regions encrypt different sequentially match better those real Further, linear congruence algorithm used generate random sequence, provides order encryption, thus enhances security encryption algorithm. Experimental results show that can effectively reduce abnormal while ensuring transmission efficiency.