Research On Digital Image Copyright Protection Technology Based On Blockchain

Due to the rapid and wide range of digital resources,piracy and illegal use and dissemination are common,the resulting copyright disputes are becoming increasingly acute.Traditional copyright protection technology is centralized management and causes user privacy leakage risks,besides,data barriers exist in different copyright management platforms.The concept of decentralizations used in Blockchain,and has the characteristics of non-tampering and anti-counterfeit traceable,providing new solution for digital copyright protection.The Consensus mechanism is the core of Blockchain,but it cannot be directly applied to digital rights protection because of their drawbacks,such as high latency and throughput.This thesis analyzes and compares the mainstream consensus algorithms,and proposes an improved Practical Byzantine Fault Tolerance(PBFT)consensus algorithm based on them.The algorithm is combined with the Delegated Proof of Stake(DPoS)consensus algorithm,and the nodes in the network are reclassified into consensus nodes and backup nodes based on the voting results,and the consensus process is optimized.The test results show that the improved PBFT algorithm has a significant improvement over the traditional PBFT algorithm in terms of consensus latency,communication overhead,and throughput.The traditional hash algorithm is sensitive to the original data and is not suitable for image authentication.This thesis proposed an image authentication algorithm based on image features.The algorithm in this thesis extracts the feature points of an image based on the SIFT algorithm and calculates the image perception hash value.The test results show that the algorithm in this thesis can effectively authenticate digital image works.Based on the Ethereum blockchain,this paper implements a digital image copyright protection prototype system by combining SIFT algorithm,image-aware hashing algorithm,digital watermarking and other technologies.The test results show that this system can effectively carry out secure storage and credible confirmation of digital image works.