On-chain and off-chain data sharing scheme based on distributed oracle machine and homomorphic encryption

A homomorphic encryption and data sharing technology, applied in the blockchain field, can solve problems such as poor data timeliness and inability to obtain data

Active Publication Date: 2020-12-01
东北大学秦皇岛分校
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method needs to occupy a large amount of data space and network bandwidth to pre-uplink the data. At the same

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  • On-chain and off-chain data sharing scheme based on distributed oracle machine and homomorphic encryption
  • On-chain and off-chain data sharing scheme based on distributed oracle machine and homomorphic encryption
  • On-chain and off-chain data sharing scheme based on distributed oracle machine and homomorphic encryption

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[0059] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described implementation Examples are only some embodiments of the present invention, not all embodiments. 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.

[0060] The on-chain and off-chain data sharing scheme based on distributed oracle and homomorphic encryption provided by the present invention includes four types of entities: data user, blockchain, oracle node, and data provider. Among them, the blockchain deployment system management contract , oracle contract, data stora...

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Abstract

The invention belongs to the technical field of block chains. The scheme comprises four kinds of entities including a data user, a block chain, an oracle machine node and a data provider, and the block chain deploys a system management contract, an oracle machine contract, a data storage contract, a data request contract and a user-defined contract; wherein the oracle machine node comprises a request adaptation node, a response adaptation node and a request execution node; according to the scheme, cooperative sharing of the on-chain data and the off-chain data is realized by using the distributed oracle machine, the network bandwidth and the on-chain storage space demand are reduced, and the data integrity can be verified through the on-chain evidence storage; according to the scheme, homomorphic encryption is used for protecting data privacy in the processing process of the oracle machine and realizing basic under-chain computing capacity, better universality and verifiable safety areachieved. Meanwhile, data aggregation operation is set under a chain, and the processing performance is improved compared with on-chain aggregation.

Description

technical field [0001] The invention relates to the technical field of block chains, in particular to an on-chain and off-chain data sharing scheme based on distributed oracle machines and homomorphic encryption. Background technique [0002] With the help of distributed technology and cryptography technology, blockchain technology realizes the trusted storage of data in an incompletely trusted environment. It has the characteristics of decentralized architecture, full traceability of data, non-tampering and non-repudiation, and is regarded as the information Internet. Key technologies for the transition to the Internet of Value. The first generation of blockchain technology started with Bitcoin, mainly as a distributed ledger. The representative of the second-generation blockchain technology is Ethereum, which focuses on expanding data storage and computing forms through smart contract technology, forming a new distributed computing paradigm. The third-generation blockcha...

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Application Information

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IPC IPC(8): G06F21/60G06F21/62G06F21/64H04L9/00H04L29/06H04L29/08
CPCG06F21/602G06F21/6245G06F21/64H04L9/008H04L63/123H04L63/0442H04L63/105H04L67/025H04L67/1097G06F2221/2141G06F2221/2117
Inventor 史闻博徐欣张永欣鲁宁
Owner 东北大学秦皇岛分校
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