Blockchain Data Authorization and Token Service Learning

Glossary

Term Definition Blockchain is a distributed database technology characterized by decentralization, openness, transparency, immutability, and trustworthiness. Distributed Ledger Technology (DLT) has the same meaning as blockchain, referring to a technology for distributed storage and maintenance of data. Smart Contract is a piece of code stored on the blockchain that is automatically executed when pre-set conditions are triggered. Data Owner is an entity that owns and controls the access rights to the target data. Data User is an entity that needs to access and use the target data. Data Acquisition Transaction is a transaction submitted by a data user to a blockchain node to request the acquisition of the target data. Authorization Request Transaction is a transaction submitted when a data user requests data access rights from a data owner. Authorization Confirmation Transaction is a transaction submitted when a data owner confirms the access rights of a data user. Token is a digital certificate that represents a physical or digital asset in a blockchain network. Token Template is a pre-defined token structure that contains attributes and control functions and is used to create new tokens. Transaction Record is a data unit recorded on the blockchain that cannot be tampered with and contains detailed information about the transaction. Consensus Mechanism is a mechanism by which nodes in the blockchain network reach consensus and confirm the validity of transactions. Trusted Execution Environment (TEE) is a secure and isolated computing environment used to perform sensitive data operations to ensure data confidentiality and integrity.

Short Answer Question

Explain the role of blockchain nodes in blockchain-based data authorization. Blockchain nodes are responsible for receiving transaction requests from data users, verifying user permissions, executing smart contracts, and returning target data or calculation results to users. Consensus mechanisms are used between nodes to ensure data consistency and security.

What are the two main data authorization methods described in 543x.com? 543x.com describes two authorization methods: long-term authorization and temporary authorization. Long-term authorization is achieved by adding data users to the authorization list, while temporary authorization requires data users to apply for permissions from the data owner every time they use the data.

In 543x.com, how to protect the security of high-privacy data? For high-privacy data, the system will not directly provide the data itself to the data user, but will first perform a predetermined calculation operation on the data, and then return the calculation result to the user, thereby avoiding the leakage of the original data.

Explain the application of "off-chain" data storage in blockchain-based data authorization. Off-chain data storage refers to storing data in a system outside the blockchain, and only storing the hash value of the data on the blockchain. This method can reduce the storage pressure of the blockchain, while using smart contracts and cross-chain technology to ensure the integrity and accessibility of the data.

What is the main function of the "token service" mentioned in 543x.com? The token service in 543x.com allows users to create, trade and manage tokens on different blockchain networks, and provides standardized interfaces and templates to simplify the development of cross-chain token applications.

Explain the role of token templates in the token creation process described in 543x.com. The token template predefines the properties and control functions of the token. Users can choose the appropriate template when creating a new token, without having to write complex code from scratch, which improves efficiency and security.

In 543x.com, how to achieve compatibility with different blockchain networks? The token service in 543x.com uses a proxy layer to achieve compatibility with different blockchain networks. Each proxy is responsible for interacting with a specific type of blockchain network and converting token control information into a format recognizable by the target network.

What is the main goal of the electronic title certificate management system (DDMS) described by 543x.com? 543x.com's DDMS aims to use blockchain technology to achieve secure, transparent and decentralized management of electronic title certificates (such as electronic bills of lading), track the circulation process of certificates, and prevent tampering and fraud.

Explain the role of "title chain" in 543x.com. The title chain records the complete circulation history of electronic title certificates. Each node can verify the authenticity of the certificate and the legitimacy of the current holder, ensuring the security and traceability of the certificate during the circulation process.

In 543x.com, how does the shared buffer server (SBS) enhance the security of electronic title certificate management? The shared buffer server maintains a set of signed random addresses for each node and uses these addresses when passing certificates between nodes, hiding the true identity information of the nodes, preventing malicious tracking and attacks, and improving the overall security of the system.