Smart Contract System and Smart Contract method

摘要

Disclosed is a smart contract system and method. In a smart contract method according to an aspect, a seller node registers a sale on a blockchain, and in a state in which a professional member node participates, the seller node negotiates a contract for the sale with the buyer node to prepare an electronic contract, , Verifying the legal validity of the created electronic contract, verifying the smart contract code corresponding to the electronic contract by the seller node, and extracting and extracting personal information and sensitive information from the electronic contract by the seller node De-identifying and encrypting personal information and sensitive information, and storing the electronic contract in which the seller node has personal information and sensitive information de-identified and encrypted in a distributed data storage, and wherein the seller node stores the electronic contract. It may include the step of registering in the blockchain.