Group signature-based supervisible block chain transaction privacy protection method and system

A technology of privacy protection and group signature, which is applied in the field of blockchain, can solve the problems of supervising nodes with great power and prone to internal corruption, and achieve the effect of ensuring information security

Pending Publication Date: 2021-12-07
SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to realize the supervision of blockchain transactions, the present invention discloses a privacy protection method and system for supervised blockchain transactions based on group signatures, through the group signature technology and the supervision structure and supervision key generation designed in the present invention

Method used

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  • Group signature-based supervisible block chain transaction privacy protection method and system
  • Group signature-based supervisible block chain transaction privacy protection method and system
  • Group signature-based supervisible block chain transaction privacy protection method and system

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0031] Example one

[0032] This embodiment provides a method of privacy protection based on group-signed regulatory block chain transaction;

[0033] The privacy protection method of block chain transaction based on group signature, including:

[0034] S101: Each transaction node is sent to the notarized mechanism node. After the notarized mechanism node is verified, the authentication certificate for each transaction node is generated; where the transaction node, including: transaction initiation node and transaction receiving node;

[0035] S102: The transaction initiation node sends the group administrator node to the group administration, the group administrator node and the notarized authority node interaction, to complete the identity legal verification of the trading node applying for the group; after verify the identity, the transaction initiates nodes and group administrators The node interacts, generates a group signature of the transaction;

[0036] S103: After receivi...

Example Embodiment

[0122] Example 2

[0123] This embodiment provides a privacy protection system based on group-signed regulatory block chain transaction;

[0124] Based on group-signed regulatory block chain transaction privacy protection system, including: Several transaction nodes, block chains, the block chain with a notarized mechanism node, group administrator node, and multiple audit nodes; Notary agency nodes, group administrator nodes, and multiple audit nodes together form an audit node network;

[0125] Each transaction node is sent to the notarized mechanism node. After the notarized mechanism node is verified, the authentication certificate for each transaction initiation node and transaction receiving node is generated; where the transaction node, including: transaction initiation node and transaction receiving node ;

[0126] The trading node sends the group administrator node to the group application, the group administrator node and the notarized authority node interaction to comple...

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Abstract

The invention discloses a group signature-based supervisible block chain transaction privacy protection method and system, and the system comprises transaction nodes which each have a certificate issued by a CA; a node initiating a transaction applies for a group signature certificate from an anonymous group, and a group administrator generates the group signature certificate and an encryption public key after performing authentication with the node; the transaction node signs the transaction by using the group signature certificate and broadcasts the signature; after the miner verifies the integrity of the broadcast content, the uplink is completed; the auditing node broadcasts to-be-tracked transaction information; decryption keys from other auditing nodes are received then, and a negotiation decryption algorithm is operated to decrypt and verify the encrypted supervision letter public key; and finally, the identity represented by the public key is tracked to a user identity list according to the public key obtained by decryption. Through a CA certificate and group signature supervision structure and in combination with a designed key generation and negotiation decryption algorithm, distributed supervision is realized on the basis of anonymity of a transaction initiator, and abuse of supervision power is prevented.

Description

technical field [0001] The invention relates to the technical field of block chains, in particular to a privacy protection method and system for supervisable block chain transactions based on group signatures. Background technique [0002] The statements in this section merely mention the background technology related to the present invention and do not necessarily constitute the prior art. [0003] Blockchain is a distributed ledger based on a peer-to-peer network. Its anonymity and non-tamperability have broad application prospects in many different fields. With people's emphasis on privacy protection, many blockchain application chains have introduced cryptographic primitives such as group signatures, ring signatures, and zero-knowledge proofs to protect the privacy of blockchain transaction user identities and transaction content. With the continuous development of privacy protection technology, the anonymity of blockchain continues to increase. While strong anonymity ...

Claims

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Application Information

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IPC IPC(8): G06F21/62G06Q40/04G06Q20/06G06Q20/38G06Q20/40
CPCG06F21/6254G06Q40/04G06Q20/065G06Q20/3825G06Q20/3829G06Q20/4014Y02D30/50
Inventor 付昆仑王连海徐淑奖张淑慧邵蔚胡闪闪
Owner SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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