DATA SECURITY OF SHARED BLOCKCHAIN DATA STORAGE BASED ON ERROR CORRECTION CODE

摘要

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for storing blockchain data. One of the methods includes receiving a request from a blockchain node to be removed from the blockchain network; identifying a plurality of blocks associated with blockchain data stored by the blockchain node; determining, for each block in the plurality of blocks: a first difference between a total number of remaining blockchain nodes of the blockchain network excluding the blockchain node requesting to be removed and a maximum number of faulty blockchain nodes tolerable by the remaining blockchain nodes, a second difference between a first number of the remaining blockchain nodes that store a dataset of information bits or redundant bits divided from an error correction coding (ECC) encoded version of the block and a second number of the remaining blockchain nodes that store a dataset of redundant bits divided from the ECC encoded version of the block, and whether the first difference is less than the second difference; and retrieving blockchain data associated with the block from the blockchain node in response to determining that the first difference is less than the second difference.