Research Guide on Blockchain Security

Research Guide on Blockchain Security

Glossary

Blockchain: A decentralized distributed ledger that records transaction data and ensures its security and immutability through cryptography.

Distributed Automatic Synchronous Array (DASA) Database: A database system in which data is distributed and stored on multiple nodes and data consistency is ensured through synchronization mechanisms.

User Device: A device that interacts with the access control system, such as a smartphone, RFID tag, etc., to initiate access requests.

Access Device: A device responsible for verifying user identity and authorizing access rights, such as a door access system, database server, etc.

Encryption: The process of converting data into an unreadable format to protect its confidentiality.

Decryption: The process of converting encrypted data back into a readable format.

Key: Cryptographic information used to encrypt and decrypt data.

Tolerance: The range of errors or asynchrony that a system allows in data transmission.

Mesh Network: A network topology in which each node is connected to multiple other nodes to improve the reliability and bandwidth of the network.

Transaction Specific Code (TS Code): A unique code used to verify the authenticity of a transaction, similar to a transaction serial number.

Metadata: Data that describes data, such as creation time, modification time, file size, etc.

Short Answer Question

What role does the DASA database play in an access control system? The DASA database stores and retrieves data related to users, access rights, and transactions. The main DASA database stores complete data, while the partial DASA database stores partial data and can operate independently or collaboratively.

How is the communication between the user device and the access device encrypted? The user device and the access device use the same key or key pair to encrypt and decrypt data transmission. The key can be stored in the device memory, DASA database, or blockchain.

What is the main difference between the five-level encryption scheme? The main difference between the five-level encryption scheme is the way the key is generated and stored. For example, the first level uses a static key, while the third level uses a dynamic key, and the fifth level uses an algorithm-generated key.

What role does tolerance play in an access control system? Tolerance allows a certain degree of error or asynchrony in data transmission to improve the flexibility and reliability of the system.

Why can mesh network structure improve the security of access control system? Mesh network structure provides redundant paths for data transmission. Even if some nodes fail, the system can still operate normally, thereby improving the reliability and security of the system.

How to distinguish between physical user devices and virtual user devices? Physical user devices are real hardware devices, such as smartphones or RFID tags, while virtual user devices are logical entities created by software, such as electronic tickets or QR codes.

What is the role of log and monitoring databases? Log and monitoring databases record system events, such as user access, authentication, and data transmission, for auditing, analysis, and troubleshooting.

How to use blockchain to enhance the security of access control system? Integrating DASA database and access control logic into blockchain can improve the security of the system by leveraging the decentralization, immutability, and transparency of blockchain.

How does the access control system prevent unauthorized access? Access control systems prevent unauthorized access through mechanisms such as multi-level authentication, data encryption, access rights control, and logging.

How to determine whether blockchain technology is suitable for my application scenario? Factors such as data security requirements, transaction frequency, credibility requirements, and cost-effectiveness of the application scenario need to be considered to determine whether blockchain technology is suitable.

Paper Title

Analyze and compare three different types of blockchain (public chain, consortium chain and private chain), and discuss their advantages and disadvantages in access control systems.

Explore how to use blockchain technology to implement a secure digital identity management system to solve the security risks and inefficiency faced by traditional identity management systems.

Design a blockchain-based supply chain management system, use blockchain technology to achieve product traceability, anti-counterfeiting and information transparency, and improve the efficiency and security of the supply chain.

Study the application of blockchain technology in electronic voting systems, analyze how it can ensure the anonymity, immutability and verifiability of voting, and improve the fairness and transparency of elections.

Explore the impact of blockchain technology on future society and economy, and analyze its potential and challenges in promoting data sharing, reducing transaction costs and building a trust system.