A Blockchain Covert Communication Method Based on Voting Contract

Abstract

In order to meet the increasing demand for information transmission with high confidentiality, it is important to propose new covert communication methods. The performance of covert communication technology includes security and hiding rate. At the same time, blockchain technology is characterized by decentralization, anonymity and traceability, and is a natural hidden communication carrier. Ethereum is one of the classic and commonly used blockchain currency applications. Therefore, this paper uses the voting contract in Ethereum smart contract to build a hidden channel based on the blockchain, and encodes information through different options in the voting contract. In addition, we analyze the channel from security, scalability and cost.