Blockchain anonymous trading system based on multi-hop payment

In recent years, with the emergence of bitcoin, blockchain technology has attracted more and more attentions from academia and industry. The advantages of blockchain are decentralized trust, not tampered, traceable and consensus features. However, transaction processing speed is 7 transactions per second in the bitcoin network. The transaction processing performance is not suitable to many applications in e-commerce field. Hence, the scalability of transaction consensus on blockchain has become a challenge issue. There are existing works to solve the issue, such as the lightning network, which exploits cross-chain consensus to improve the scalability of the bitcoin transaction. However, the anonymity between seller and buyer is still a privacy challenge for the fast blockchain payments based on the lightning. In this paper, we propose a blockchain anonymous trading framework based on multi-hop payment to solve the scalability problem of the blockchain transactions and improve the efficiency of transactions among nodes. Firstly, we use Three-session encryption to build multiple encryption transaction channels between a pair of nodes. Secondly, Dijkstra is used to find a minimal anonymous service fee path. Finally, the experimental results show that lightning network with encryption transaction channels can improve the use efficiency, reduce the extra cost of transaction and guarantee the privacy information of users.