Identity authentication method and system for blockchain

Identity authentication method and system for blockchain

Glossary

Term definitionAuthentication nodeA node that initiates an identity authentication request, that is, a node that needs to prove its identity.Authentication metanodeA node that verifies identity, that is, a node that receives an identity authentication request and verifies it.Identity proof disclosure nodeA node that has disclosed its identity information on the blockchain and can provide identity proof for other nodes.Identity proof disclosure parent nodeA node that provides identity proof for an identity proof disclosure node.BlockchainA chain data structure formed by connecting data blocks in chronological order, and cryptographically ensuring that it cannot be tampered with or forged.Digital signatureAn electronic data similar to an electronic signature, used to verify the integrity of the data and the authenticity of the source.One of a pair of keys in a public key asymmetric encryption algorithm, used to encrypt information or verify digital signatures.One of a pair of keys in a private key asymmetric encryption algorithm, used to decrypt information or generate digital signatures.Account addressA string of characters generated based on a public key, used to identify a user on the blockchain.TransactionAn operation that transfers value on the blockchain, such as transferring money, publishing information, etc.Consensus mechanismAn algorithm that each node in a blockchain network reaches consensus on, such as PoW (proof of work).

Short answer questions

Please briefly describe the purpose and advantages of the identity authentication method proposed in the present invention.

In the present invention, what information does the authentication node need to include in the authentication request?

How does the identity proof public node prove the identity of the authentication node?

What is the role of blockchain in the present invention?

How does the authentication meta-node verify the validity of the digital signature?

Please explain what is a "challenge code" and its role in the present invention.

How does the method proposed in the present invention solve the single point failure problem in the traditional authentication mechanism?

How to obtain the public key of the identity proof public node?

What role does the parent node of the identity proof public node play in the present invention?

How does the identity proof public node revoke the public identity proof?

Answers to short answer questions

The present invention aims to solve the single point failure and security problems in the traditional authentication mechanism, and realize decentralized identity authentication by using blockchain technology to improve the availability and security of the system.

The authentication request needs to include the identity information of the authentication node itself and the identity information of the identity proof public node.

The identity proof public node uses its own private key to digitally sign the identity information of the authentication node and write the digital signature into the blockchain.

In the present invention, the blockchain acts as a decentralized database for recording identity information and digital signatures to ensure data security and traceability.

The authentication meta-node verifies the digital signature using the public key of the identity proof public node. If the verification is successful, it means that the digital signature is valid and the identity of the authentication node is true.

The "challenge code" is a randomly generated code sent by the authentication meta-node to the authentication node. The authentication node needs to sign and return the challenge code with its own private key to prove that it owns the private key, thereby verifying its identity.

The present invention avoids the single point failure problem by storing identity information and digital signatures on a decentralized blockchain. Even if a node fails, it will not affect the normal operation of the entire system.

The public key of the identity proof public node can be directly obtained through the blockchain or pre-stored by the authentication meta-node.

The parent node of the identity proof public node is responsible for providing identity proof for the identity proof public node to verify the reliability of the identity proof public node.

The identity proof public node can revoke the disclosed identity proof by writing a revocation certificate on the blockchain. The revocation certificate contains the identity proof information to be revoked and the digital signature of the identity proof public node.

Essay question

Discuss the advantages and disadvantages of the present invention compared with traditional identity authentication methods in detail.

Analyze the possible security risks in the present invention and propose corresponding solutions.

Discuss the applicability of the present invention in different application scenarios, such as the Internet of Things, supply chain finance, etc.

Assuming that the present invention is applied to cross-chain identity authentication, discuss how to achieve identity information intercommunication between different blockchain networks.

Design an identity authentication system architecture based on the present invention, and explain the functions and interaction processes of each module.