Research On Privacy Protection Of Personal Data Trading Based On Blockchain

With the advent of the Big Data era,the application value of personal data has gradually become more prominent in social governance,scientific research,product development and marketing,and mass life entertainment.Personal data trading promotes the circulation of personal data,so that the value of personal data has been played to a greater extent,at the same time,there are some special privacy-preserving and data security requirements in trading personal data.Individuals involved in data transactions not only want data transferred only between the parties,but also hope that privacy can be well protected while participating in the transaction.However,when trading personal data through existing data trading platforms,these platforms often have the possibility of retaining personal data without permission,and there is no effective protection for the privacy of both parties.These problems hinder the transaction of personal data.In view of the above questions,we carry out the following work:Firstly,by analyzing the trading patterns of existing data trading platforms,we believe that there are data security and privacy protection issues when trading personal data through existing data trading platforms.Combining the functional needs and privacypreserving requirements in personal data transactions,we divide the personal data trading process into four parts: joining the transaction system,data trading demand release,data transfer,transfer and settlement,and propose the privacy protection issues existing in the above four aspects respectively.Secondly,combining with the above analysis and research,using cryptography and blockchain technology,we propose a privacy protection scheme based on blockchain for personal data transaction,which solves the privacy protection problems of the above four respects,and ensures the security of data in personal data transactions.Thirdly,based on the proposed block-based personal data transaction privacy protection scheme,we design a new kind of decentralized personal data trading system,and realize the key technology of four parts in the process of personal data trading,which meets the data security and privacy protection needs of trading participants while completing personal data trading.Finally,based on the above implementation,the experiment is designed and carried out,and the experimental data is combined to analyze the correctness of the personal data transaction process and the effectiveness of the privacy protection mechanism in the scheme.At the end,we summarize the work in this paper,and point out the shortcomings of our work and the direction of further research.