Blockchain-based data management system

Glossary

Term DefinitionBlockchainA technology that distributes and stores data such as transaction details over a network rather than a centralized serverSmart ContractA program that automatically executes contracts on a blockchainDApp (Decentralized Application)Blockchain-based Decentralized applicationP2P (Peer to Peer)A network type in which each node has equal authority and is directly connected to each otherTimestampTime when data was created InformationNodeIndividual entity participating in the blockchain networkMiner Node that creates and verifies new blocks in the blockchain network. Transaction. Data changes that occur in the blockchain network. Block. Unit that collects, encrypts, and stores multiple transactions. Hash. Fixes data of arbitrary length. Function to convert to a string of the desired length Cryptocurrency Digital currency wallet created based on blockchain technology Program to store and manage cryptocurrency Public Key Address used to receive cryptocurrency Private key (Private Key)Password quiz to prove your authority to use cryptocurrency

1. Explain the main characteristics of blockchain technology and compare the differences with existing centralized systems. (2-3 sentences)

2. Explain what a smart contract is and what role it plays in a blockchain-based data management system. (2-3 sentences)

3. Explain the components and functions of each element of the blockchain-based data management system presented in the text. (2-3 sentences)

4. In the system presented in the text, please explain how data is stored and managed on the blockchain. (2-3 sentences)

5. Explain what the ‘time stamp’ used in the system presented in the text is and how it contributes to securing data integrity. (2-3 sentences)

6. Explain how to manage data access rights using smart contracts in the system presented in the text. (2-3 sentences)

7. Explain how data change history management is done in the system presented in the text. (2-3 sentences)

8. Please suggest security problems and solutions that may arise when actually implementing the system presented in the text. (2-3 sentences)

9. Explain at least three advantages and disadvantages of the system presented in the text. (2-3 sentences)

10. Give at least three examples of fields where the system presented in the text can be applied, and explain how it can be used in each field. (2-3 sentences)

quiz answers

1. Blockchain technology is a technology that improves security and transparency by distributing and encrypting data. Unlike existing centralized systems, all participants share and verify data without a central server, so there is no single point of failure and data falsification is difficult.

2. A smart contract is a program that runs automatically according to predefined conditions on the blockchain. It plays a role in increasing data reliability and efficiency by automatically verifying and executing contract terms in the data management system.

3. The system in the text consists of a user who requests data creation and change, a node that records and manages data on the blockchain, a blockchain that serves as a data storage, and a smart contract execution environment.

4. The node that receives the user's request creates data and metadata, creates a block containing this, and adds it to the blockchain. Each block is linked by a hash value to ensure the order and integrity of the data.

5. Timestamp records the time information when data was created and proves the time of creation of data stored in the blockchain. This prevents forgery and falsification of data and ensures its integrity.

6. You can store user information with data access rights in a smart contract and control access to data only to authorized users through user authentication and authority verification.

7. Data change history is recorded through new block creation. By storing hash values of changed and previous data together, changes can be tracked and verified.

8. Problems such as security vulnerabilities in the blockchain network itself, errors in smart contract code, and private key leaks may occur. To solve this, methods such as regular security updates, smart contract audits, and introduction of multi-signature methods can be used.

9. Advantages: Transparency, security, increased efficiency, ensuring data integrity, eliminating intermediaries. Disadvantages: Technical complexity, limited scalability, legal uncertainty, lack of skilled manpower.

10.

Supply chain management: Establishing a transparent and safe supply chain by recording all processes from product production to distribution on blockchain

Medical record management: Store patient medical records on blockchain to prevent forgery and safe sharing

Real estate transactions: Creating a transparent and safe real estate transaction environment by recording ownership proofs, contracts, registration information, etc. on the blockchain

essay questions

Describe in detail the core technical elements of the blockchain-based data management system presented in the text, and analyze the impact of each element on the overall performance and stability of the system.

Compare and analyze the system described in the text and the existing centralized data management system, and discuss specific improvements and expected effects from the introduction of blockchain technology from various aspects.

Please provide specific examples of applying the system presented in the text to specific fields (e.g., medical care, logistics, finance, etc.), and analyze in-depth problems and solutions that may arise in that field from a blockchain technology perspective.

Analyze the impact that blockchain technology development will have on future society across various fields (economy, society, culture, etc.), and suggest expected problems and solutions to suggest a desirable direction for the development of a blockchain-based society.

Propose concrete ideas for improving the system presented in the text, analyze the impact of the proposed ideas on the performance, security, and efficiency of the system, and logically explain the effects.