Blockchain-based data authorization method and apparatus

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• receiving, by a blockchain node, an authentication transaction submitted by a privacy computing platform, wherein the authentication transaction queries whether a data user has obtained authorization of target data possessed by a data owner;
• invoking, by the blockchain node, a request interface defined in a smart contract, wherein an authorization request event is written into a transaction log in response to invoking the request interface, and wherein the transaction log is monitored by the data owner;
• in response to invoking the request interface, invoking, by the blockchain node, an authorization interface defined in the smart contract based on an authorization confirmation transaction submitted by the data owner in response to the authorization request event being written into the transaction log, wherein the authorization interface defined in the smart contract is configured to authorize the data user;
• updating, by the blockchain node, an authorization state of the data user based on the authorization interface defined in the smart contract;
• and
• in response to updating the authorization state of the data user, executing, by the blockchain node, the smart contract invoked by the authentication transaction to provide an authorization token to the privacy computing platform that instructs the privacy computing platform to obtain the target data, and send a computational result of one or more predetermined computational operations based on the target data to the data user.

A computer-implemented system comprising:

• one or more processors;
• and
• one or more computer-readable memories coupled to the one or more processors and having instructions stored thereon that are executable by the one or more processors to perform one or more operations comprising:
• receiving, by a blockchain node, an authentication transaction submitted by a privacy computing platform, wherein the authentication transaction queries whether a data user has obtained authorization of target data possessed by a data owner;
• invoking, by the blockchain node, a request interface defined in a smart contract, wherein an authorization request event is written into a transaction log in response to invoking the request interface, and wherein the transaction log is monitored by the data owner;
• in response to invoking the request interface, invoking, by the blockchain node, an authorization interface defined in the smart contract based on an authorization confirmation transaction submitted by the data owner in response to the authorization request event being written into the transaction log, wherein the authorization interface defined in the smart contract is configured to authorize the data user;
• updating, by the blockchain node, an authorization state of the data user based on the authorization interface defined in the smart contract;
• and
• in response to updating the authorization state of the data user, executing, by the blockchain node, the smart contract invoked by the authentication transaction to provide an authorization token to the privacy computing platform that instructs the privacy computing platform to obtain the target data, and send a computational result of one or more predetermined computational operations based on the target data to the data user.