Block chain privacy data protection method, device and system

Abstract

The invention provides a block chain privacy data protection method, device and system. The method comprises the steps that a transaction user encrypts the transfer amount and the remaining amount ofthe transaction user by using a trusted third-party mechanism whole-network homomorphic public key to generate a first encrypted transfer amount and an encrypted remaining amount, and encrypts the transfer amount by using a public key of a receiver to generate a second encrypted transfer amount; the transaction user broadcasts a private data protection request in the whole network, and forms a mixed transaction group based on the request; determining a group administrator so that the group administrator generates a group public key and a private key based on an encryption algorithm; the transaction user sends a transaction mixing request to the mixing node, and sends transaction information and address information of input and output addresses signed by using a user public key to the mixing node after receiving a certificate returned by the mixing node; and the transaction users receive the transaction order returned by the hybrid node, verify the transaction information in the transaction order and then return transaction signatures so that the hybrid node aggregates the transaction signatures of all the transaction users in the group and generates a hybrid transaction order.

Description

Technical field [0001] The present invention relates to the field of blockchain technology, and in particular to a method, device, system and storage medium for protecting privacy data of a blockchain. Background technique [0002] Blockchain technology is based on cryptographic algorithms, based on a specific consensus mechanism, through the construction of a block-based sequential chain data structure, a P2P network for data synchronization is a multi-node, self-organizing, and non-functional Falsified, safe and reliable distributed ledger system. Blockchain has the characteristics of decentralization, collective maintenance, non-tampering, security and credibility. There is usually no central server in the blockchain network. Therefore, each node in the blockchain system needs to back up a complete ledger for joint maintenance. The integrity of the ledger to reduce the risk of single point of collapse and data leakage faced by centralized and centralized servers. [0003] Howe...

AI Technical Summary

Problems solved by technology

[0008] The existing blockchain privacy data protection focuses on the protection of transaction privacy data, but it is difficult to take into account the protection of transaction privacy and identity privacy. There are still many deficiencies in security and scalability, making it difficult to effectively protect the privacy data of transaction users

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