Abstract
The demand for secure storage of shadow service data of Internet of things devices makes the traditional centralized platform storage method unable to ensure the security and credibility of key data. This paper analyzes that the main security risks faced by the shadow data storage of Internet of things devices are the lack of credibility guarantee mechanism and the lack of secure encryption and decryption combined with verifiable methods. A series of advantages of block chain technology can solve the above problems. By combining the key technologies such as blockchain structure, encryption algorithm, consensus mechanism and so on, the DeviceShadow-BlockChain mechanism of Internet of things is proposed. An adaptive RAFT consensus algorithm is designed, which is suitable for reaching consensus quickly. In addition, asymmetric encryption technology combined with hash algorithm is used to ensure the security and unusurability of data transmission. In the application layer of the DeviceShadow-BlockChain of the Internet of things, the data chain management platform is used to realize the functions of device shadow data winding, fast consensus, distributed certificate storage and so on.
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