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Decentralized collaborative verification model and verification algorithm

A collaborative verification and decentralization technology, applied in user identity/authority verification, digital transmission systems, electrical components, etc., can solve problems such as confusion and tampering verification records, improve data security, improve security, and avoid security problems Effect

Active Publication Date: 2018-11-30
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a more serious situation, TPA and CSP may collude to obfuscate and tamper with verification records

Method used

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  • Decentralized collaborative verification model and verification algorithm
  • Decentralized collaborative verification model and verification algorithm
  • Decentralized collaborative verification model and verification algorithm

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Embodiment Construction

[0041] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] Such as figure 1 As shown, a kind of decentralized collaborative verification model of the present invention, referred to as DCOM (DecentralizedCOllaborative verification Model, decentralized collaborative verification model) includes: data owner, cloud service provider, collaboration network and block chain four key components .

[0043] The block of the blockchain stores the POR Merkle tree generated by POR (Proofs of Retrievability, proof of retrievability) records. Among them, the leaf node of the POR Merkle tree consists of a binary group, such as figure 2 shown. A tuple records each POR record (ρn) and the digital signature of the data owner (Sigs(n)). A POR record can be verified by a given intermediate hash value, the verification path. The data structure of the POR Merkle tree is a binary tree used to store the hash v...

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Abstract

The invention discloses a decentralized collaborative verification model and verification algorithm. The model comprises four key components: a data owner, a cloud service provider, a collaboration network and a blockchain, wherein the block storage of the blockchain is composed of a POR Merkle tree generated by a POR record, a leaf node of the POR Merkle tree consists of a two-tuples, and the two-tuples records the POR record and a digital signature of the data owner. The decentralized collaborative verification model disclosed by the invention brings the characteristics of the blockchain into the process of outsourcing data storage and verification in an untrusted environment, so that the data security can be improved, the security problem that may be caused by handing over a data verification process to a third party in the traditional data outsourcing service is avoided, the efficiency is improved, and the security is improved.

Description

technical field [0001] The invention belongs to the field of computer databases, and in particular relates to a decentralized collaborative verification model and a verification algorithm. Background technique [0002] As an important part of cloud services, outsourced data is widely used due to its high reliability, low cost and strong scalability. Nowadays, more and more cloud service providers (CSP, Cloud Service Provider) have launched outsourced data applications, such as Google AppEngine, Microsoft Azure Platform, Amazon S3 and Baidu Cloud, etc. Outsourced data services provide users with distributed storage solutions, thereby reducing the burden on users of massive data management. [0003] In fact, when using outsourced services, users will lose the ability to control the outsourced data, which makes it impossible for users to guarantee the integrity and availability of outsourced data. In response to this problem, current measures mainly include data retrievabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L29/08
CPCH04L9/3247H04L67/104H04L67/1097
Inventor 信俊昌白砚领郝琨贾大宇刘禄
Owner NORTHEASTERN UNIV
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