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Homomorphic commitment-based blockchain privacy protection method and blockchain system

A privacy protection and blockchain technology, applied in the blockchain privacy protection method based on homomorphic commitment and the blockchain system field, can solve the problem that data cannot be used for mathematical operations, etc., to ensure the support of encrypted information ciphertext calculation, Effects of securing privacy and improving feasibility

Active Publication Date: 2021-07-16
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a blockchain privacy protection method and blockchain system based on homomorphic commitments, which are used to solve the problem in the prior art that mathematical operations cannot be performed on data in the ciphertext state obtained after ordinary commitment encryption

Method used

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  • Homomorphic commitment-based blockchain privacy protection method and blockchain system
  • Homomorphic commitment-based blockchain privacy protection method and blockchain system
  • Homomorphic commitment-based blockchain privacy protection method and blockchain system

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Embodiment Construction

[0035] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] The shapes and sizes of the components in the drawings do not reflect the real scale, but are only intended to schematically illustrate the content of the present invention.

[0037]The terms "first" to "fourth" in the specification and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the term "comprises", as well as any variat...

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Abstract

The invention discloses a blockchain privacy protection method based on homomorphic commitment and a blockchain system, and the method comprises the steps: verifying received first homomorphic commitment data sent by a transaction sender and second homomorphic commitment data sent by a transaction receiver, and determining whether the transaction succeeds or not, wherein the first homomorphic commitment data and the second homomorphic commitment data are data obtained by calculating the transfer amount plaintext by adopting the homomorphic commitment; if it is verified that the first homomorphic commitment data and the second homomorphic commitment data are not equal, determining that the transaction fails; and otherwise, verifying the verification data of the first homomorphic commitment data and the second homomorphic commitment data, and when the verification data accords with a data format preset by the blockchain system, determining that the transaction succeeds, and updating the account balances of the transaction sender and the transaction receiver. By using the homomorphic commitment on the blockchain, the dual effects of ensuring the privacy of the transaction information of the blockchain and supporting encrypted information ciphertext calculation can be achieved, and the feasibility of business landing is improved.

Description

technical field [0001] The invention relates to the technical field of block chain communication, in particular to a block chain privacy protection method and block chain system based on homomorphic commitment. Background technique [0002] In recent years, blockchain technology has attracted widespread public attention, and blockchain-related technologies themselves have also developed rapidly. Blockchain (Blockchain) is a kind of accounting technology jointly maintained by multiple parties, using cryptography to ensure transmission and access security, and can achieve consistent data storage, difficult to tamper, and prevent denial of accounting technology, also known as distributed ledger technology (Distributed Ledger Technology) . [0003] However, since the blockchain ledger data is jointly maintained by all nodes in the blockchain network, some data in the ledger can only be viewed by some authorized nodes in real applications. However, due to the need to A consensu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00G06Q20/38G06Q40/04
CPCH04L9/008G06Q20/3825G06Q40/04G06Q20/382
Inventor 李骁张宇驰梁宵牟森
Owner AEROSPACE INFORMATION
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