Blockchain cross-entity identity authentication system and method

Blockchain cross-entity identity authentication system and method

Glossary

Term Definition Blockchain (Blockchain) A decentralized distributed ledger technology used to record transaction data and ensure its security and immutability through cryptography. Blockchain transaction (Blockchain transaction) Operations for value transfer in a blockchain network, such as creating an account, calling a smart contract, transferring money, etc. Smart contract (Smart contract) A piece of code stored on the blockchain that is automatically executed when the preset conditions are met and triggers corresponding operations. Decentralized identifier (DID) A new type of digital identity identifier that is controlled by the user independently, does not rely on any centralized organization, and can be used in combination with technologies such as blockchain. DID document (DID document) A document associated with a DID, containing metadata information about the DID, such as public key, authentication method, service endpoint, etc. Verifiable credential (VC) A digital credential that contains a statement about an entity issued by a trusted organization, such as age, education, work experience, etc. DID resolver (DID resolver) A software module used to parse DIDs and DID documents, which can obtain the corresponding DID document based on the DID. BaaS cloud (BaaS cloud) is a cloud platform that provides blockchain services, such as creating and managing blockchain networks, deploying smart contracts, etc. KMS (Key Management System) is a system used to generate, store and manage keys, such as private key management for DID. Short answer question

Briefly describe the advantages of blockchain technology in cross-entity identity authentication. Blockchain technology has the characteristics of decentralization, security, transparency, and immutability. It can solve the problems of single point failure of centralized institutions, data leakage, and identity theft in traditional identity authentication systems. By storing identity information on the blockchain, users can control their own identity information autonomously and improve the security and credibility of identity authentication.

Explain the concept of decentralized identifiers (DIDs) and their role in identity authentication. DID is a digital identity identifier that is controlled by users autonomously and does not rely on any centralized institution. In identity authentication, users can use DIDs to prove their ownership of an identity without revealing other personal information.

What is a verifiable credential (VC)? Give examples of the use of VC in actual application scenarios. VC is a digital credential issued by a trusted institution that contains statements about an entity. For example, a university can issue a graduation certificate VC, and a government agency can issue a driver's license VC, etc. VC can be used to prove the user's identity information or qualification certificate in various scenarios.

Explain the role of DID documents and list some important information contained in them. DID documents are documents associated with DIDs and contain metadata information of DIDs, such as public keys, authentication methods, service endpoints, etc. This information can help other entities verify the validity of DIDs and interact with DID owners.

Briefly describe the role of BaaS cloud in blockchain applications. BaaS cloud platform is a cloud platform that provides blockchain services to users, such as creating and managing blockchain networks, deploying smart contracts, etc. BaaS cloud can lower the threshold for users to use blockchain technology and simplify the development and deployment process of blockchain applications.

Explain the network environment shown in Figure 1 and explain the relationship between the various components. Figure 1 shows a typical blockchain network environment, including client devices, server-side, BaaS cloud and blockchain system. Client devices interact with blockchain systems through server-side or BaaS cloud, such as creating accounts, submitting transactions, etc.

Briefly describe the DID creation process shown in Figures 6A and 6B. Figures 6A and 6B show two different ways to create DIDs. In Figure 6A, the user creates a DID through the user-side system, while in Figure 6B, the user creates a DID directly through the identity management application.

Explain the blockchain cross-entity authentication process described in Figure 16. Figure 16 shows a blockchain cross-entity authentication process. The user first registers with the second entity and obtains a DID and VC. The user can then use the DID and VC to access the services of the first entity without registering again.

Briefly describe the concept of secondary DID and its advantages in protecting user privacy. Secondary DID is a temporary DID associated with the primary DID and is used to access services in specific scenarios. Using secondary DID can avoid leaking users' sensitive information, thereby protecting user privacy.

Explain the blockchain cross-entity authentication method described in Figure 17 and explain how it works. Figure 17 describes the steps of the blockchain cross-entity authentication method in detail. This method uses blockchain technology and the DID/VC system to enable users to authenticate safely and conveniently between different entities.

Essay question

Discuss in detail how blockchain technology solves the security and privacy issues existing in traditional authentication systems.

Compare and contrast the advantages and disadvantages of centralized authentication systems and decentralized authentication systems.

Explore the role and future development trend of DID/VC technology in building a trusted digital identity system.

Analyze the application scenarios and value of blockchain cross-entity identity authentication technology based on actual cases.

Design a blockchain-based cross-entity identity authentication system and explain its architecture, functional modules and workflow in detail.