FSC: File Storage in Coded Blockchain with C-PBFT Consensus Protocol

Secure file storage and distribution is a key challenge in the information era. It is important to ensure the files are not tampered or eavesdropped during storage and transmission. A promising solution is to store the files in blockchain. However, the massive blockchain data makes it hard to operate a file blockchain in resource restricted end devices. To this end, this paper proposes a File Storage in Coded Blockchain (FSC) solution that leverage the advantage of error correction code. In particular, the block data can be encoded and distributed stored at different nodes to reduce the storage requirement. In addition, this paper propose a Coding Practical Byzantine Fault Tolerant (C-PBFT) consensus protocol to distribute the coded information with reduced communication overhead. Simulation results show that the proposed FSC significantly reduces the storage requirement as compared with traditional blockchain technologies.