Secure transaction method and device based on a block chain

A blockchain and transaction technology, applied in the blockchain field, can solve the problems of transaction data leakage, data security and personal privacy cannot be guaranteed, low performance, etc., and achieve the effect of ensuring security, encryption performance and security performance

Active Publication Date: 2019-03-19
ZHONGAN INFORMATION TECH SERVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the technical implementation of the existing block chain, the security calculation of the transaction is not considered based on the block chain combined with the client device and the smart contract, so that the transaction data is easily leaked on the client device and the smart contract. If the transaction data is plaintext Institutions or individuals using the blockchain will expose their transaction intentions, and data security and personal privacy cannot be guaranteed; if homomorphic decryption or secure multi-party computing is used on the blockchain system, the performance of the system will be higher than that commonly used The asymmetric algorithm of the

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  • Secure transaction method and device based on a block chain
  • Secure transaction method and device based on a block chain
  • Secure transaction method and device based on a block chain

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Embodiment Construction

[0016] In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. Accordingly, the following detailed description is not limiting, and the scope of the invention is defined by the appended claims.

[0017] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0018] First, briefly describe the terms / concepts involved in this application. T...

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Abstract

The invention discloses a secure transaction method and device based on a block chain. The node end equipment of the block chain calls the smart contract based on the contract information, the node end of the block chain decrypts the encrypted transaction parameters in the contract information by using the public key in the certificate, and executes the smart contract based on the transaction parameters; after the block chain node achieves consensus on the execution result in the block chain; wherein the node encrypts a key and a value based on the certificate public key and then writes the key and the value into the node database, the client inquires a transaction result through the blockchain node and needs to encrypt transaction parameters, the blockchain node needs to decrypt based onthe public key and then encrypt and return the transaction result, and the client decrypts based on the private key to obtain a plaintext result. Through the technical scheme of the invention, data security and data privacy protection for transaction and query can be formed.

Description

technical field [0001] The invention belongs to the field of block chains, and in particular relates to a method and device for secure transaction calculation based on block chains. Background technique [0002] Blockchain uses distributed node consensus algorithms to generate and update data, uses cryptography to ensure the security of data transmission and access, generates non-tamperable and non-forgeable distributed ledgers, and establishes a data network of mutual trust. [0003] In the technical implementation of the existing block chain, the security calculation of the transaction is not considered based on the block chain combined with the client device and the smart contract, so that the transaction data is easily leaked on the client device and the smart contract. If the transaction data is plaintext Institutions or individuals using the blockchain will expose their transaction intentions, and data security and personal privacy cannot be guaranteed; if homomorphic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q20/06G06Q20/38G06Q40/04
CPCG06Q20/065G06Q20/3829G06Q40/04
Inventor 刘雄文
Owner ZHONGAN INFORMATION TECH SERVICES CO LTD
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