Research On Security Technology Based On Blockchain

Centralized architecture networks often suffers from cyber attacks,bringing a security threat to the network.Because of the advantages of decentralization,security and traceability,blockchain technology has become a research hotspot in academic circles in worldwide.Blockchain technologies are in the stage of research and exploration,Especially in the field of energy Internet,financial payment,Internet of Things,etc..And there are broad prospects.But there are few studies on the security of blockchain,and it is urgent to study the security technology of blockchain.This paper studies the blockchain security technology.A selfish mining mechanism based on probability is designed for selfish mining attacks.In order to address this problem,the secure mining power threshold is given.Selfish mining often forms a mining pool while mining,and taking strategies to publish hidden blocks for optimal revenue.Based on this,different states of selfish mining is given with seven kinds.And then paper calculates the probability distribution of selfish mining in different situation.A new method of comparing the probability of selfish and honesty mining to determine whether the hidden blocks are published was given,which is to optimize the relative revenue.Simulating the relative revenue of selfish mining under different computing powers,then finally calculate the power threshold for ensuring the safe operating of honest nodes.The research results provides a reference of power threshold for the further study about blockchain defense selfish mining.This paper introduces the blockchain model into electricity trading,studies the application of blockchain technology in the energy Internet,giving a security electricity trade model based on blockchain.The development of blockchain technology has driven the energy Internet progress.Providing a new trading model for consumers and prosumers to trade with electricity power and cash.Aiming at the problem that double-spending attack destroys normal power transaction,a secure electricity trading model using lock mechanism is presented.The application and research status of blockchain technology in energy internet is analyzed.Then the principle of blockchain and the characteristics of power trading are studied in detail.On this basis a power transaction model based on blockchain is given.The trading price in the model takes the bidding mechanism,and the model designs a locking mechanism to lock the money and power which is used in deal transaction until the transaction block is confirmed by the entire network.And the semaphore method is introduced in the locking mechanism,which is to control the transaction funds and the commodities to be accessed serially.Model analysis shows that this mechanism can improve the security of power transactions.The model solves the problem of double-flower attack in electricity trading.The research achievements provides reference for further research on energy blockchain in the future.