Data authorization method of blockchain

Data authorization method of blockchain

Name and background:

Name: Data authorization method and device based on blockchain.

Background technology: Blockchain technology has the characteristics of decentralization, openness, transparency, and non-tamperability, and is suitable for application scenarios with high demand for data reliability.

Technical solution overview:

Data authorization method: The blockchain node receives the data acquisition transaction submitted by the data user, executes the data authorization smart contract, and issues the authorization token to the data user after confirming the authorization, instructing the privacy computing platform to obtain the target data and return it to the data user.

Role of the privacy computing platform: After obtaining the authorization token, obtain the target data from the blockchain or off-chain channel, and return the result to the data user after performing the preset operation.

Key components and processes:

Blockchain node: responsible for receiving transactions, executing smart contracts, and storing encrypted data.

Data authorization smart contract: defines authorization logic, manages the list of authorized parties, and issues authorization tokens.

Authorization token: contains information such as user ID and encrypted session key, which is used to verify authorization and data transmission encryption.

Privacy computing platform: decrypts target data, performs preset operations, and ensures data transmission security.

Data privacy and security:

Encrypted storage: The target data is encrypted with the public key of the data owner and stored in the blockchain, and the private key is hosted on the privacy computing platform.

Trusted execution environment: Use TEE technology (such as Intel SGX) to securely execute smart contracts and data encryption and decryption operations in memory.

Preset operation: Return the result after operating on high-privacy data to prevent data leakage.

Specific implementation method:

Authorization process: It includes steps such as the data user submitting an authorization request transaction, the blockchain node calling the smart contract, the data owner confirming the authorization, and the blockchain node issuing an authorization token.

Data acquisition process: The data user submits a data acquisition transaction, the blockchain node executes the smart contract to issue an authorization token, and the privacy computing platform obtains and processes the data and returns it to the data user.

Off-chain data acquisition: The blockchain node stores the digital summary of the target data, and the privacy computing platform requests data from the off-chain channel.

Figure description:

The diagram shows the example environment, conceptual architecture, method flow chart, end-to-end data authorization diagram, etc., and intuitively presents the specific implementation and application scenarios of the technical solution.

Claims:

The specific claims of the blockchain-based data authorization method and device are clarified, including key steps such as blockchain nodes receiving data to obtain transactions, executing smart contracts, and issuing authorization tokens.

Question: Please briefly describe what artificial intelligence (AI) is?

Answer: Artificial intelligence (AI) is a new technical science that simulates, extends and expands the theories, methods, technologies and application systems of human intelligence. It aims to perform tasks that usually require human intelligence through computer systems and algorithms, such as learning, reasoning, perception, understanding, language recognition, image recognition, natural language processing, etc. AI technology is widely used in various fields, such as autonomous driving, medical diagnosis, financial analysis, education, games, etc.