Research On Data Integrity Verification Technology Of Internet Of Things Based On Blockchain

In recent years,with the advancement of wireless communication technology and the continuous popularization of smart devices,the Internet of Things has been fully developed,and human society has entered a comprehensive information age.The data generated by human society is also showing explosive growth,and the emergence of cloud computing can just solve the growing storage pressure of Io T terminal devices.Gradually,the combination of Internet of things and cloud computing gave birth to a new model of Internet of things.The terminal equipment of Internet of things uploads the collected data to the cloud platform,and then the cloud platform processes and analyzes the results and returns them to the terminal equipment,so as to release the storage and computing pressure of the terminal equipment.Although this model can greatly improve social productivity,there are also data security problems,such as data integrity is difficult to guarantee,data privacy is easy to leak,etc.The features of blockchain,such as tamper resistance,distributed storage,and openness and transparency,can well solve the data security and privacy issues in the new Io T model.However,the existing blockchain-based data integrity verification schemes still cannot better solve the issues of fair,efficient and anonymous authentication of Io T data.Based on the above problems,this thesis firstly clarifies the security requirements of Io T data integrity verification,focusing on the fairness,efficiency and anonymous authentication of Io T data integrity based on blockchain,and proposes specific solutions to the above problems.The research content of this paper includes the following two aspects.1.This thesis proposes a blockchain-based fair and efficient Io T data integrity verification scheme.In this scheme,the metadata for inspection is no longer generated by the end user,but by the blockchain.A consensus on metadata is reached by the nodes in the blockchain.After reaching a consensus,the metadata is returned to the end user.The end user can verify the data integrity with the help of the metadata and the cloud platform.Therefore,the scheme can realize the mutual trust mechanism of the scheme with the help of the distributed trust nature of the blockchain to ensure the fairness of the scheme.What’s more,this scheme utilizes hash functions and Pedersen commitments to construct specific schemes to achieve high efficiency in data verification.Ultimately,this scheme analyzes the security,computational overhead,communication overhead and redundancy rate of the proposed scheme,and compares it with related schemes,and this scheme is superior to related data integrity verification schemes in both computational and communication overhead.2.This thesis proposes a blockchain-based anonymous authentication Io T data integrity verification scheme.This scheme mainly combines blockchain and group signature,and utilizes the properties of blockchain and group signature to achieve the legitimate interests of end users and the privacy protection of cloud platform.At the same time,this scheme also improves the traditional group signature scheme,replaces a single group administrator with multiple group administrator groups,and solves the single point of failure and key escrow problem in the group signature scheme.Finally,this scheme also analyzes the correctness,security and performance of the proposed scheme,and this scheme is superior to related data integrity verification schemes in terms of security and performance.