A Personal Data Determination Method Based On Blockchain Technology and Smart Contract

Abstract

Data determination is the primary issue to be addressed in open data sharing. This paper proposes a personal data determination method based on blockchain and smart contract, which are used to solve the problem that the current data transaction market relies heavily on system-center entities. it is difficult for centralized method to confirm the data is true and reliable and cause the owner lose the control over data access. The method implements identity authentication by means of certificate authority, and uses digital signature and hash function to store a digest of the original data into the blockchain.By doing this can determine ownership of the data, and prevent it from being tampered with. Constructing a blockchain serving at data interaction platform to realize access control and transfer rights about personal data through the smart contract installed on it,because the operation record of data will be kept on the blockchain one by one.Then using resource state view to speed up the query process. According to experimental simulation concerning about throughput and latency, blockchain and smart contracts can guarantee the authenticity of the data and achieve the right to confirm the data and promote the open sharing of data.