METHODS FOR IMPLEMENTING PRIVACY PROTECTION IN BLOCKCHAIN

摘要

A computer-implemented method includes receiving, by a first blockchain node, an encrypted transaction comprising a smart contract that includes code, wherein the code of the smart contract comprises a contract state indicated by a privacy identifier; decrypting, by the first blockchain node, the encrypted transaction to obtain the code of the smart contract in plaintext; executing, by the first blockchain node, the code of the smart contract in plaintext in a trusted execution environment; encrypting, by the first blockchain node using a key, the contract state indicated by the privacy identifier; and writing, by the first blockchain node, the encrypted contract state indicated by the privacy identifier to a database.