Overview of Blockchain Data Privacy Protection

Blockchain has the advantages of decentralization and distributed sharing of global ledger, but at the same time, it also has the risk of data privacy leakage. In order to prevent the privacy of blockchain users from being stolen by malicious attackers, there is still a large space for development of various protection mechanisms. At first, this paper analyzes the architecture of chain block, the Blockchain data privacy threat mainly summarized data for the application layer, network layer, data privacy threats to privacy, consensus layer data and transaction layer data privacy threats to privacy, and respectively summarized this paper introduces the principle of all kinds of privacy protection mechanism, characteristics, and different ways of implementation, Finally, it points out the future research direction of blockchain data privacy protection.