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Distributed cross-chain system and cross-chain information interaction and system access control mechanism

An access control and information interaction technology, applied in the blockchain field, can solve problems such as business security impact, blockchain data communication and value transfer difficulties, and achieve strong flexibility and scalability, and improve security.

Active Publication Date: 2020-11-27
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of blockchain technology, many blockchains oriented to different application scenarios and with different characteristics continue to emerge. However, due to the large differences between blockchains, the data communication and value between different blockchains Difficulties in transferring
At the same time, the cross-chain communication data between blockchains often contains important private information of the blockchain, and the leakage of such information will seriously affect the security of blockchain-related businesses

Method used

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  • Distributed cross-chain system and cross-chain information interaction and system access control mechanism
  • Distributed cross-chain system and cross-chain information interaction and system access control mechanism
  • Distributed cross-chain system and cross-chain information interaction and system access control mechanism

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Experimental program
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Embodiment 1

[0033] image 3 It is a one-to-one blockchain cross-chain data interaction and transaction processing method. As shown in the figure, blockchain A users can log in to the cross-chain system client through PC or mobile terminals, and bind blockchain A account, when the user sends a cross-chain message M with private data, the message data will be added with the relevant tags of blockchain A, further indicating that it comes from blockchain A.

[0034] Step 1: Before sending a cross-chain message M, the user of blockchain A needs to fill in the user address of the target blockchain B, design an access control strategy to specify which attributes users in the system can view the specific information requested, and upload the user's Identity certification information, etc., in which the client signs and encrypts the cross-chain message M through digital signature technology and elliptic curve encryption technology.

[0035] When the distributed cross-chain system receives a cross...

Embodiment 2

[0043] Figure 4 It shows a one-to-many blockchain cross-chain data interaction and transaction processing method. As shown in the figure, step 1, step 2 and step 4 are related to image 3 The methods shown are the same, while the other steps are executed independently by the relay node 2 and the relay node 4 . Since the setting of the access structure in the attribute cryptosystem has strong flexibility, it can better support the one-to-many secret sharing scheme, so the relay node 3 only needs to set up a set of access structures to construct The receiver's fine-grained access control policy can greatly reduce the workload of the sender's relay node.

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Abstract

The invention discloses a distributed cross-chain system and a cross-chain information interaction and system access control mechanism. The distributed cross-chain system comprises a plurality of cross-chain clients, a cross-chain relay node, an attribute authority mechanism and a point-to-point encryption channel. The access control mechanism comprises the steps that a relay node verifies a blockchain user; the relay node adapts to the block chain attribute and agents the cross-chain message and encryption transmission of the block chain attribute, the attribute authority mechanism issues anattribute key and a cross-chain certificate to the relay node, a target block chain peer-to-peer relay node receives the encrypted file and decrypts and compares the cross-chain certificate, and finally the cross-chain message is received by a target block chain user so as to realize cross-chain communication. According to the invention, the relay node can be flexibly set to meet the cross-chainmessage proxy requirement of the specific block chain; high flexibility and expandability are realized, meanwhile, a decentralized attribute revocable and updatable attribute cryptographic mechanism is utilized, a fine-grained access control strategy is provided for cross-chain communication of the block chain, and the safety of a cross-chain system of the block chain is improved.

Description

technical field [0001] The present invention relates to the technical field of block chains, in particular to a distributed cross-chain system based on an attribute cryptography system, and also to a cross-chain information interaction and system access control mechanism. Background technique [0002] With the rapid development of blockchain technology, many blockchains oriented to different application scenarios and with different characteristics continue to emerge. However, due to the large differences between blockchains, the data communication and value between different blockchains Transfers are faced with many difficulties. At the same time, the cross-chain communication data between blockchains often contains important private information of the blockchain, and the leakage of such information will have a serious impact on the security of blockchain-related businesses. Contents of the invention [0003] Purpose of the invention: In view of the existing needs of bloc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06H04L9/32
CPCH04L67/10H04L67/104H04L63/0428H04L9/3247H04L9/3252H04L9/3218H04L9/50
Inventor 孙知信刘晨磊徐玉华陈松乐骆冰清赵学健
Owner NANJING UNIV OF POSTS & TELECOMM
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