A public blockchain system supporting private transactions and a processing method for private transactions

Abstract

The invention discloses a private transaction processing method, a public node, a transaction-related node, and a public blockchain system. The method includes initiating a transaction; generating a symmetric encryption key, and using the symmetric encryption key to pair the transaction content field of the transaction Encrypt the transaction content to obtain the first encrypted data; use the public keys of all transaction-related nodes that need to execute the transaction to encrypt the symmetric encryption key respectively to obtain the second encrypted data; pack the first encrypted data and the second encrypted data, and upload To the distributed storage system; receive the hash value returned by the distributed storage system; fill the hash value into the transaction content field; broadcast the transaction. The method provided by the invention can effectively guarantee the privacy data of users while retaining the security and reliability of a large number of nodes in the public blockchain system.

Description

technical field [0001] The invention relates to the technical field of block chains, in particular to a private transaction processing method, public nodes, transaction-related nodes and a public block chain system. Background technique [0002] The blockchain system can be classified into three categories from the access mechanism, public blockchain, alliance chain and private chain. Among them, the most famous public blockchain systems include Bitcoin, Ethereum, EOS, etc.; the blockchain system with an access mechanism for the alliance chain, only authorized nodes can join the system. Currently, the most famous public blockchain platform It is Hyperledger Fabric; the private chain is a completely private blockchain system, and other nodes cannot access the system. [0003] The biggest advantage of the public blockchain is security and stability. Since any node can join the network freely, the huge number of users brings high security. However, in order to make all nodes a...

AI Technical Summary

Problems solved by technology

Among them, the most famous public blockchain systems include Bitcoin, Ethereum, and EOS, etc.; the blockchain system with an access mechanism for the alliance chain, only authorized nodes can join the system. Currently, the most famous public blockchain platform It is Hyperledger Fabric; the private chain is a completely private blockchain system, and other nodes cannot access the system

[0003] The biggest advantage of the public blockchain is security and stability. Since any node can join the network freely, the huge number of users brings high security. However, in order to make all nodes agree on the system status, the public area All transaction data in the blockchain system is public, which is not conducive to protecting the privacy of users, especially in the application scenario of personal data sharing

In contrast, alliance chains and private chains are more conducive to protecting the privacy of users. Due to the existence of authorization mechanisms, unrelated nodes cannot access transaction data

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