Vehicular ad-hoc network data security sharing and storage system based on blockchain technology

A vehicle-mounted self-organization and network data technology, applied in digital transmission systems, services based on specific environments, security devices, etc., can solve problems such as low efficiency, network congestion, and vulnerability to security attacks, so as to improve efficiency and prevent leakage Effect

Active Publication Date: 2019-03-08
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But their scheme lacks practical issues such as pre-selected node management and scalability
Jia Wenkang of Guangdong University of Technology and others designed a peer-to-peer power transaction model based on the alliance blockchain. Although it solved the scalability problem, it found that its security could not be fully guaranteed during the information transaction process and was vulnerable to security attacks.
Because the traditional blockchain system (for example, Bitcoin) requires all nodes in the entire network to agree and bookkeeping together, this will lead to practical problems such as inefficiency and network congestion
Moreover, the above scheme is not very suitable for solving the security problems of data sharing and storage in the vehicle ad hoc network

Method used

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  • Vehicular ad-hoc network data security sharing and storage system based on blockchain technology
  • Vehicular ad-hoc network data security sharing and storage system based on blockchain technology
  • Vehicular ad-hoc network data security sharing and storage system based on blockchain technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1. Digital signature technology.

[0058] The invention involves a large number of vehicles for data sharing, which can easily be monitored and forged in the process of information interaction. The system needs a safe privacy protection method to ensure the accuracy of information and tamper-proof. The basic information from the vehicle node must be authenticated and integrity checked before it can be authorized. Otherwise, the attacker can replace the data or even fake other vehicles to broadcast the wrong information. Therefore, the digital signature technology based on elliptic curve bilinear pairing properties is used in the alliance chain to perform batch anonymous authentication on the message transmission in the vehicle ad hoc network. Corresponding (S02) and Figure 4 , The specific steps of digital signature will be described in detail below.

[0059] (1) Pre-distribution stage

[0060] Vehicle nodes and roadside unit nodes need to be registered with trus...

Embodiment 2

[0104] Example 2. The establishment of blockchain data blocks.

[0105] The billing node of the roadside unit of the alliance blockchain of the present invention is responsible for collecting the interactive information uploaded by the vehicle within a certain period of time into the local storage device. Encrypt and digitally sign these records, and then organize them into blocks, such as (S04). figure 2 It is the block chain structure of the present invention. In order to make the data traceable and tamper-proof, each block contains the encrypted hash value of the previous block. Similar to the Bitcoin system, the accounting node needs to find a hash value that meets a certain difficulty to provide effective proof of work.

[0106] The data block is generally composed of a block header and a block body. The block header contains information such as the current version number, the solution random number of the current block consensus process, the value of the timestamp and the ...

Embodiment 3

[0109] Example 3. The realization of the consensus process.

[0110] The Practical Byzantine Fault Tolerance (PBFT) consensus mechanism is adopted in the alliance blockchain in the present invention. The consensus process is jointly completed by ordinary roadside unit nodes and leader (denoted as Leader) roadside unit nodes. Leader is the master node in the consensus process, and other common roadside unit nodes are slave nodes, such as (S05). Figure 5 It is a flowchart of the consensus process of the present invention. The leader broadcasts the collected data blocks to the slave nodes for verification and review. Among the abnormal slave nodes, there are generally malicious nodes and faulty nodes, and their behavior is that they do not respond to requests from other nodes. Suppose the total number of nodes in the network is n, and the number of abnormal nodes is f. The system uses the PBFT consensus algorithm to allow a maximum of abnormal nodes with f=(n-1) / 3 to exist, and ...

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PUM

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Abstract

The invention discloses a vehicular ad-hoc network data security sharing and storage system based on a blockchain technology. The vehicular ad-hoc network data security sharing and storage system based on the blockchain technology comprises a vehicle, a roadside unit, and a trusted institution. When data shared by the roadside unit, the vehicle performs digital signature on interactive informationby using a bilinear algorithm based on an elliptic curve to ensure the non-repudiation and integrity of the data; the roadside unit packs the collected data into a block, and uses the Byzantine fault-tolerant consensus mechanism to make the data block reach a coherent protocol across the network, thereby improving the fault tolerance of the system and making system more stable; after reaching theconsensus, the block is sorted by a smart contract in the roadside unit and stored in the blockchain, and other consensus nodes save the data synchronously; and the system rewards a corresponding number of data coins to the roadside unit, and then the data coins are assigned to the vehicle contributing the data by the smart contract, so as to keep the entire system active and stable.

Description

Technical field [0001] The invention belongs to the secure transmission and storage of data in a vehicle ad-hoc network (Vehicular Ad-Hoc Network, VANET), and relates to blockchain technology in the field of information security, and digital signature verification technology based on bilinear pairing properties on elliptic curves . Background technique [0002] As a part of the intelligent transportation system, the vehicle-mounted self-organizing network improves traffic flow and reduces congestion, and provides convenient information services. Its goal is to provide self-organized data transmission capabilities for vehicles on the road and to achieve applications such as assisted vehicle driving and safety warnings. The traffic management center can reasonably allocate road resources through distributed synchronization and coordination. Therefore, the on-board self-organizing network will play a major role in the development of intelligent transportation systems to ensure the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/44H04W12/04H04W12/10H04W84/18H04L9/32H04L29/08H04W12/0431H04W12/106
CPCH04L9/3252H04L67/104H04W4/44H04W12/04H04W12/10H04W84/18
Inventor 张小红陈晓峰
Owner JIANGXI UNIV OF SCI & TECH
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