Blockchain Data Protection Research Guide

Blockchain Data Protection Research Guide

Knowledge Quiz

What is the permission management field and what role does it play in smart contracts?

How does the present invention use block data to protect smart contracts?

Why is it said that the present invention can reduce backup risks compared to traditional multi-chain + plaintext data technology?

What is the key distribution method mentioned in the present invention? What is the key type?

How does the present invention solve the problem of low efficiency of traditional homomorphic encryption algorithms?

Explain the role of data consensus in blockchain technology.

In the present invention, what key information does the achievement of data consensus depend on?

What is Merkleroot and how is it used for data consensus in the present invention?

What functions does the data management module proposed in the present invention have?

Briefly describe the functions of the key management module in the present invention and explain how to improve its security.

Answer

The permission management field is a part of the smart contract that is used to define which nodes can access and operate the contract. It usually contains a list of accessible addresses and the access rights of each address, such as read, write or execute permissions.

The present invention encrypts the smart contract and stores it in the block data, and distributes the decryption key to the authorized nodes in a peer-to-peer manner. Even if unauthorized nodes obtain block data, they cannot decrypt and view the content of smart contracts, thereby achieving data protection.

Unlike traditional multi-chain technology that requires the maintenance of multiple blockchains, the present invention stores the encrypted smart contract on a unique blockchain, and all nodes can be backed up, thereby reducing the backup risk caused by the limit on the number of nodes.

The present invention uses point-to-point communication for key distribution, and the key type is symmetric key.

The present invention does not use a complex homomorphic encryption algorithm, but uses a traditional encryption algorithm to encrypt smart contracts, avoiding the high latency and low efficiency caused by high algorithm complexity.

Data consensus refers to the process in which all nodes in the blockchain network reach a consensus on transaction data, ensuring the accuracy and consistency of the data, and is the basis for the security and reliability of blockchain technology.

The data consensus in the present invention relies on the transaction data summary (such as merkleroot) formed by the block number, smart contract number and historical transaction data of the smart contract.

Merkleroot is a hash value that represents the summary of all historical transaction data of the smart contract. When performing data consensus, nodes can quickly verify the integrity and consistency of transaction data by comparing merkleroot values.

The data management module is responsible for managing block data and smart contract data. It stores blockchain raw data and smart contract execution status data separately, and uses logical data sharding to manage private data smart contracts.

The key management module is responsible for maintaining the generation, distribution, use, storage and backup of smart contract keys. In order to improve security, key maintenance algorithms such as forward security or key rotation can be introduced.

Paper title

Compare and contrast the advantages and disadvantages of the present invention with traditional multi-chain + plaintext data technology and homomorphic algorithm technology in protecting blockchain data.

Discuss the specific design scheme of the permission management field in the present invention, including accessible address list, access permission control, and setting of different permission levels.

Analyze the implementation details of the data consensus mechanism in the present invention, focusing on how to achieve efficient and secure data consensus based on block number, smart contract number and transaction data summary.

Explore the feasibility and challenges of the present invention in practical application scenarios, such as supply chain management, financial technology, healthcare and other fields, and propose corresponding solutions.

Look forward to the application prospects of the present invention in the future development of blockchain technology, and how to combine it with other emerging technologies (such as zero-knowledge proof, secure multi-party computing, etc.) to further improve the security and privacy of blockchain data.

Key Terms

Term DefinitionsBlockchainA decentralized distributed ledger technology used to record and verify transactions.Smart ContractA piece of code stored on the blockchain that is automatically executed when preset conditions are met.Permission Management FieldThe part of a smart contract that defines access rights, including a list of accessible addresses and access rights.The list of accessible addresses stores a list of addresses that are allowed to access the smart contract.BlockDataThe basic unit of data on the blockchain, containing transaction data and other related information.KeyCryptographic information used to encrypt and decrypt data.Symmetric keyEncryption algorithm that uses the same key for encryption and decryption.Data exchange between two or more devices in a peer-to-peer communication network directly without going through a central server.Data ConsensusThe process by which all nodes in a blockchain network reach a consensus on the state of data.Block NumberA unique identifier for each block in the blockchain.Smart Contract NumberA unique identifier for each smart contract in the blockchain, such as an address or ID.Transaction Data SummaryA fixed-length string obtained by hashing transaction data, used to verify data integrity.MerklerootA data structure used to efficiently represent and verify the integrity of large amounts of data.Data Management ModuleA module responsible for managing blockchain data and smart contract data. The key management module is responsible for managing the generation, distribution, storage and use of keys. Logical data sharding logically divides data into multiple parts and stores them in different physical locations to improve data management efficiency.