Research On The Application Of Blockchain Evidence Storage And Forensic Technology Based On Information Features

Blockchain technology has advantages such as decentralization,user anonymization,and data transparency that cannot be tampered with.It has enormous and potential applications in fields such as archive management,e-government,and information traceability.The traditional centralized methods of information storage and forensic have cumbersome processes,long cycles,and problems with data loss,tampering,and opacity.Therefore,blockchain technology can partially solve these problems.However,information varies greatly with different features,so the application of blockchain forensics will face some new problems: a large amount of information directly linked to the chain will seriously reduce the efficiency of blockchain;only retaining information summaries on the chain cannot ensure the security of offline data;and relying solely on the summary information on the chain cannot meet the demand for rapid on-chain copyright authentication.The specific work is as follows(1)To address the above issues,a framework of blockchain evidence storage and forensics technology based on information features is proposed.In the framework,a distributed storage method based on IPFS is used to overcome the excessive volume of on-chain data and ensure the security of off-chain data,in the face of the need for a large amount of information to be stored on the chain.Furthermore,in response to the issue of some information that requires copyright verification and cannot be quickly detected for infringement solely through data hashing,feature extraction technology is introduced to improve the efficiency of on-chain information infringement verification and reduce resource to be wasted because of duplicating on chain authentication of copyright.This framework provides ideas for the chain storage and forensics of information with different characteristics.(2)In response to some information issues on second-hand car transactions,including multiple departments involved in recording,scattered data storage,cumbersome query processes,and opaque information in traditional centralized storage services,a scheme of blockchain information storage and forensics technology on second-hand cars is proposed based on the above framework.In the plan,the data information of the entire lifecycle of the vehicle is integrated into the IPFS distributed storage system off the chain,and the information hash and file index are linked to establish a transparent second-hand car information chain for easy forensics,ensuring the reliability and tamper resistance of the vehicle information.(3)In response to the demand for a large amount of data and rapid detection of copyright infringement in video information forensics,a short video copyright forensics scheme based on blockchain technology is proposed in combination with the above framework.In the scheme,based on the features of short video data,feature extraction technology is applied to obtain feature information,thereby providing an information basis for smart contract testing of video feature similarity.Based on IPFS technology,establish a mapping between original short video data and on chain certificate information,store the original video information offline,and store a small amount of data such as video hashes and feature information on the chain,thus facilitating short video dissemination and copyright protection.Experiments show that this scheme reduces the storage pressure of data on the chain,ensures the storage security of data off the chain,and improves the copyright verification speed.