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Method and system for privacy protection of block chain transaction

A blockchain and transaction technology, applied in the security field of blockchain transaction privacy

Active Publication Date: 2018-04-13
JUZIX TECH SHENZHEN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a privacy protection method for blockchain transactions, so as to solve the problem that there is no solution in the prior art that can not only provide privacy data protection, but also carry out distributed confirmation and management of data, and can also meet the requirements for Technical aspects of transaction regulation

Method used

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  • Method and system for privacy protection of block chain transaction
  • Method and system for privacy protection of block chain transaction
  • Method and system for privacy protection of block chain transaction

Examples

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Embodiment

[0061] In group signature, each user in the same group needs to have a public key, private key and group certificate. The group administrator also has the group private key. All related accounts are in the same group and managed by the group administrator.

[0062] (1) Account establishment: users can create accounts on the blockchain nodes, and the nodes automatically generate public-private key pairs and join the group. A specific example process is as follows:

[0063] A1: The user creates an account on the institution node;

[0064] A2: The node generates the account public-private key pair and prompts the user to enter the password;

[0065] A3: The node generates a public and private key file and saves it locally, and the private key file is encrypted with a password (password encryption is only one of the encryption algorithms);

[0066] A4: The node initiates an account creation application transaction, and the receiver is a built-in smart contract, which carries the...

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Abstract

The invention provides a method and system for privacy protection of block chain transaction. The method comprises: a transaction group is established between nodes of a block chain system, a user establishes an account at a node, and the node generates public and private key information of the account and then joining of a group is carried out; a transaction request node encrypts transaction information by using a broadcast encryption algorithm, carries out group signature processing on the encrypted transaction information, and then broadcasts the transaction information after broadcast encryption and group signature processing; a common non-account-recording node verifies the transaction information and then broadcasts the transaction information, an account-recording node decrypts thetransaction information and performs an intelligent contract to carry out account recording, broadcast encryption is carried out and then the information is recorded into a public account book, wherein the stored data are only allowed to be opened by the account-recording node, the transaction request node and an administration node. With the broadcast encryption algorithm and group signature technology, a privacy protection problem in the block chain system is solved and the traceability of the transaction is ensured.

Description

technical field [0001] The invention relates to the field of block chains, in particular to the security of transaction privacy of block chains and the application of the technology in fields such as block chain finance. Background technique [0002] Blockchain technology is a decentralized distributed ledger technology originated from Bitcoin. It facilitates transactions through technical endorsement rather than centralized credit institutions. It has the characteristics of decentralization, no need for central trust, tamper-proof and encrypted security. Nodes, as participants in the blockchain system, each maintain a copy of the data. The nodes maintain the consistency of the backup database data through the consensus algorithm. Improve participants' confidence in the reliability of data without establishing trust between participants. In traditional blockchain or Bitcoin technology, all data is transparent, including the content of the transaction, the address of the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/08G06Q40/04G06F21/62G06F21/60
CPCG06F21/602G06F21/6245G06Q40/04H04L9/085H04L9/3255
Inventor 李升林何德彪谢翔孙立林
Owner JUZIX TECH SHENZHEN CO LTD
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