Research And Implementation Of Social Network Privacy Protection Mechanism Based On Blockchain

Recently,all kinds of social networks have been developing,which replicate the real social relations for people,expand the scope of interpersonal communication,bring rich entertainment experience,and are widely used in all aspects of work and life.We are more and more inclined to enjoy all kinds of services on social networks.However,some data leakage incidents have caused us to worry about personal privacy.This paper studies and analyzes the privacy protection machine in social network,and improves the following aspects:(1)combining the data storage of social network with decentralized IPFS system.Now service providers use central servers to manage the data of social networks.Users not only need to store personal information on the server,but also need to forward communication data through the server.We consider using IPFS to weaken the role of the central node and using the distributed file storage provided by IPFS to protect user privacy.(2)combined with Bitcoin wallet,public key pair is used as authentication method.Traditional identity management generally depends on account and password,and these personal information needs to be saved on the central server.However,the user identity in blockchain applications such as Bitcoin and Ethereum is generated and saved by themselves.Therefore,this paper designs an identity management scheme in decentralized social network based on the identity management mode of blockchain.(3)the system is designed with smart contract.Users get the file content stored in IPFS through smart contracts,and resource owners control resources through corresponding contracts,and can make policies and charge fees according to the requirements,so as to manage and control independently without the participation of servers.We have improved the decentralized social network framework zeronet by using the relevant technologies in the blockchain,and formed a decentralised social network framework using IPFS,HD wallet address and smart contract to protect the data privacy of social network users from the way of use.