Data Pricing And Trading Platform Based On Blockchain

With the transformation of society,the process of digitalization and intelligentization is getting faster and faster.With the production of massive data,data trading market is also forming and developing.At present,the data trading methods in the market are mainly third-party data trading platforms and two sides directional trading.Although the data circulation is well promoted,some obvious problems are exposed,such as unclear data pricing mechanism,deviation between data price and value,opaque and difficult to trace data trading,and weak data storage security.There is an urgent need for a reasonable data pricing mechanism and data trading platform.This thesis proposes a dynamic data pricing mechanism based on quality feedback,which runs through the whole life cycle of data trading.Firstly,factors affecting the price of data are considered comprehensively,including original cost,processing cost and expected profit,which provides a basis for the data provider to initialize the price of data commodities.In addition,in order to measure the quality of the goods data,gives the four data quality indicators with different weights,based on the data of consumer feedback to four quality data index,build a data pricing function,the function has not negative,not diminishing,boundedness and the characteristics of no arbitrage,can adjust the data according to quality feedback score dynamic prices of the goods.This thesis designs and implements a prototype of data trading platform based on block chain,which can ensure the safety and reliability of data trading without relying on third-party data trading platform.The blockchain-based design provides immutable data summaries and transaction records.In terms of data storage,the interplanetary file system is adopted to realize the storage of data contents under the chain,and the security of data transmission is further guaranteed by proxy re-encryption technology.By writing the data pricing mechanism into the smart contract,the dynamic adjustment of data commodity price is realized,which greatly improves the intelligence of data transaction.The experimental results show that the data pricing mechanism presents the situation that the data price fluctuates around the data value under the real evaluation information.The data trading platform based on blockchain can meet the basic performance requirements and has good feasibility and applicability.