Big Data Research ›› 2018, Vol. 4 ›› Issue (1): 46-56.doi: 10.11959/j.issn.2096-0271.2018005

Special Issue: 区块链

• TOPIC:BLOCKCHAIN AND DATA SHARING • Previous Articles     Next Articles

Privacy protection mechanism for blockchain transaction data

Liehuang ZHU,Hui DONG,Meng SHEN   

  1. School of Computer Science &Technology,Beijing Institute of Technology,Beijing 100081,China
  • Online:2018-01-15 Published:2018-02-05

Abstract:

Blockchain technology is a distributed data storage technology that is de-centralized,de-trusted,open and transparent.It can reduce the cost of trust and realize safe and reliable data interaction.However,attackers can easily obtain the transaction data stored in the public ledger,and may extract transaction rules and other privacy information from this data by applying big data analysis techniques.Firstly,the thread of attack of data analysis on blockchain transaction data was analyzed,and the attack methods based on data analysis were described.Then the privacy protection mechanism of transaction data which was represented by mixing mechanism was introduced,the basic principle of various mixing methods was described in brief,and the advantages and disadvantages of different mixing approaches for the problem of whether a central node was needed in the process of mixing were analyzed.In the end,the limitation of the existing technologies and envision the future directions on this topic was discussed.

Key words: blockchain, mixing mechanism, data privacy protection

CLC Number: 

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