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Financial system transaction-oriented block chain privacy protection method based on lattice password

A financial system and privacy protection technology, applied in the field of blockchain applications, it can solve the problems of inability to find the address and the recipient connection, slow proof process, high computing overhead, etc., to achieve flexible permission configuration, resistance to quantum attacks, flexible permissions management effect

Active Publication Date: 2021-11-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Monero uses nonces to update the address of each transaction to ensure that observers cannot find the connection between the address and the recipient, but time series analysis methods make it possible to trace transactions
Zerocoin introduces zero-knowledge proof technology to hide transaction parameters, but its high computational overhead makes the proof process very slow

Method used

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  • Financial system transaction-oriented block chain privacy protection method based on lattice password
  • Financial system transaction-oriented block chain privacy protection method based on lattice password
  • Financial system transaction-oriented block chain privacy protection method based on lattice password

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Embodiment Construction

[0065] The specific implementation process of the method of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0066] Such as figure 1 As shown, the implementation process of the privacy protection transaction method of the financial system based on the block chain using lattice cryptography is elaborated.

[0067] In the bank intermediary ledger system, B 1 ,B 2 ,...,B m representing the head offices of various banks, On behalf of head office B i The jth branch of the branch has users (the nth user of i head office j branch).

[0068] Utilize lattice cipher based on block chain financial system privacy protection transaction method to realize user (the pth user of i head office j branch) to the user (the tth user of r head office s branch) transfer process, including the following steps:

[0069] Step 1: System initialization. The initialization of the entire system is divided into three parts: glob...

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Abstract

The invention relates to a financial system transaction-oriented block chain privacy protection method based on a lattice password, and belongs to the technical field of block chain application. According to the method, transaction information is anonymously stored on a global account book block chain, and other nodes except for banks and users related to the transaction cannot know any useful information of the transaction. The superior node can check the transaction records of the subordinate nodes, the subordinate nodes cannot directly query the transaction records of the superior node and other subordinate nodes, and when query is needed, query can be achieved only when the recovery condition of the secret sharing mechanism is met. The encryption system adopted by the method is designed based on the lattice difficulty problem, and the method is still safe and available even after the quantum computer is practical. According to the method, transaction data can be effectively protected, flexible authority management is achieved, and quantum attacks can be effectively resisted.

Description

technical field [0001] The invention relates to a blockchain privacy protection method, in particular to a financial system transaction-oriented blockchain privacy protection method based on lattice cipher, which belongs to the technical field of blockchain applications. Background technique [0002] With the continuous development and popularization of blockchain technology, blockchain has attracted more and more attention from governments and financial institutions. In the financial field, banks and financial institutions hope to reduce data maintenance costs and improve data security through blockchain. At the same time, since the blockchain is based on a peer-to-peer network, it means that the blockchain mechanism does not process and store data from the central node, so all transaction records must be disclosed to all nodes, which is very detrimental to user privacy. Especially in the financial field, user data is one of the core competitiveness of enterprises, and fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/62G06F21/64G06Q20/38
CPCG06F21/6254G06F21/64G06Q20/3829G06Q20/3825
Inventor 盖珂珂陈思源祝烈煌
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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