Using blockchain network connection information

Using blockchain network connection information

Briefly describe the problems that roaming users encounter when accessing services in a network without a roaming agreement.

In the absence of a roaming agreement, the visited network cannot connect securely with the user's home network, so it cannot verify the identity of the roaming user and cannot authorize it to access network services, resulting in the roaming user being unable to use the network.

How does the blockchain network help networks without roaming agreements to authenticate roaming users?

Blockchain networks can implement a "temporary roaming agreement" through smart contracts. The visited network pays a fee to the smart contract, obtains a connection information package, and then connects to the AAA server of the user's home network for authentication.

What role does the smart contract play in the blockchain network?

A smart contract is a piece of code stored in the blockchain network that is automatically executed when the preset conditions are met. In this solution, the smart contract is used to receive payment from the visited network, generate and distribute connection information packages, and authorize it to connect to the AAA server of the user's home network.

What important information does the connection information package contain?

The connection information package contains the authorized user network address, validity period parameters, access credentials, and contact information of the home network AAA server, etc.

How does the home network AAA server verify the legitimacy of the connection request?

The home network AAA server can verify the legitimacy of the connection request by verifying the IP address or message authentication code (MAC) of the connection request. IP address verification confirms that the request comes from the same entity as the address declared when paying, while MAC verification confirms that the request comes from the entity that pays for the connection information packet.

Describe how VAF obtains the connection information packet.

VAF first maps the user's home network domain name to the smart contract address in the blockchain network, and then initiates a transaction to the address, paying the fee and providing its own IP address and other information. After the smart contract confirms the transaction, it generates a connection information packet and sends it to VAF.

What are VBA and HBA respectively? How do they interact with each other?

VBA is a blockchain application in the accessed network, responsible for purchasing connection information packets; HBA is a blockchain application in the home network, responsible for deploying and listening to smart contracts. VBA obtains connection information packets by transacting with smart contracts deployed by HBA.

Why is MAC address-based verification more secure than IP address?

Because MAC addresses are bound to specific network interfaces and are difficult to forge, they can more reliably confirm that the request comes from the entity that pays for the connection information packet. IP addresses can be used by other entities, and their security is relatively low.

What role does DNS play in the blockchain network user information authentication scheme?

DNS can be used to resolve the domain name of the user's home network into the address of the smart contract, making it easier for VAF to find the corresponding smart contract for transactions.

Briefly describe the advantages of the blockchain network user information authentication scheme.

This scheme does not require the establishment of a roaming agreement in advance, and can achieve fast and secure online payment and connection information packet acquisition through the blockchain network, simplifying the network configuration process and improving efficiency.

Questions and answers

Detail the process of the blockchain network user information authentication scheme, and analyze its advantages and disadvantages compared with traditional roaming agreements.

Discuss how to ensure the security of transactions and the privacy of user information in the blockchain network user information authentication scheme.

Analyze the impact of different types of blockchain networks (such as public chains, private chains, and alliance chains) on the user information authentication scheme.

Explore the feasibility and challenges of applying the blockchain network user information authentication scheme to the Internet of Things scenario.

Design a billing system based on the blockchain network user information authentication scheme, and analyze its security and scalability.

Glossary

Term DefinitionsAAA Authentication, Authorization and AccountingVAF Visited Network AAA FunctionHAF Home Network AAA FunctionUE User EquipmentNAI Network Access IdentifierBlockchain A distributed ledger technology used to record transaction informationSmart ContractA piece of code stored on the blockchain that is automatically executed when preset conditions are metConnection Information Packet generated by a smart contract that authorizes the visited network to connect to the user's home networkAAA ServerBlockchain ApplicationApplications that interact with the blockchain network, such as VBA and HBAAPI application program interface, allowing applications to interact with each otherMAC message authentication code, used to verify the integrity and authenticity of the message