Abstract: Disclosed herein are a method and apparatus for blockchain-based data security, the method being performed by a data security apparatus. The data security method indudes: a primary encryption step of converting original data, previously stored in an original data storage apparatus, into primary encrypted data by encrypting the original data; a secondary encryption step of converting the primary encrypted data into secondary encrypted data by encrypting the primary encrypted data; and a blockchain transmission step of transmitting the secondary encrypted data to a node constituting a part of a blockchain network so that the secondary encrypted data is stored in the ledger of a blockchain.

Abstract: The present invention discloses a blockchain information determination server and a recording medium in which a program is recorded. In other words, the present invention is intended to overcome the above-described problems, and provides a technology that performs the confirmative determination of report information regarding fake news by calculating the degrees of reliability of actors who participate in a blockchain. According to the present invention, the following effects are achieved: First, the report information used to determine whether news is fake news may be shared by multiple subjects. Second, the present invention contributes to the activation of a system by providing rewards to a subject who determines whether news is fake news and a system management subject via reliability. Third, the present invention contributes to the automation of the blocking of fake news by performing the probabilistic determination of whether news is fake news based on reliability.