Research Of Digital Signatures In Secure Storage Of Blockchain Under Specific Internet Of Things Scenarios

Due to the rapid development of blockchain,people are not satisfied with the use of blockchain as an electronic money system,and more and more blockchain applications have been expanded.Because of its characteristics of decentralization and non-tampering,more and more people use the blockchain technology to store data.The non-tampering feature makes the data more secure,at the same time the decentralized structure makes the data more transparent.However,the storage of blockchain technology also brings some problems: first,how to integrate the blockchain into the real life application scenarios;second,the problem of blockchain data storage,how to store data securely in the blockchain and the size of data storage space.In this paper,two different storage mechanisms are proposed for wireless body area network and smart home application environment.(1)We propose a data storage mechanism based on blockchain.The blockchain technology is used to store the data in the wireless body area network.The storage space for blockchain is limited,and the stored data is subject to unauthorized access.In this paper,a sequential aggregation signature scheme based on designated-verifier is proposed to ensure that the data of users can only be viewed by designated users,thus protecting the privacy of wireless body area network users.In addition,the signature scheme achieves the purpose of compressing the blockchain storage space.(2)We propose a distributed cloud storage mechanism for smart home.In order to enhance the security of data,blockchain technology is adopted for smart home data storage and data connection,and the distributed storage provider smart home data storage model based on blockchain is adopted.Currently,the blockchain has limited block storage space,and the digital signature of blockchain is inefficient in processing storage transactions.To solve these problems,this paper proposes an identity-based proxy aggregation signature scheme,which improves the efficiency of signature verification and data processing and reduces the storage space.