Blockchain Based Data Protection Framework for IoT in Untrusted Storage

With the continuous growth of the number of Internet of things(IoT) devices, more and more data are generated by IoT devices. IoT terminal devices need to transfer the data to the edge server for storage, so protecting the security of IoT data has become a huge challenge. As a new technology, blockchain has the characteristics of distributed, tamper-resistant. Smart contract running on the blockchain can automatically perform tasks. Because of these characteristics, blockchain can solve the data security problem of the IoT. In this paper, a blockchain-based data protection framework for the IoT in untrusted storage is proposed. Lightweight streaming authenticated data structures are also used to reduce the storage burden of the blockchain system and improve the efficiency of the framework. Finally, simulation results show that our work can reduce the storage burden of blockchain.