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A vehicle ad hoc network data security sharing and storage system based on blockchain technology

A vehicle-mounted self-organization, network data technology, applied in digital transmission systems, services based on specific environments, network topology, etc., can solve problems such as vulnerability to security attacks, low efficiency, network congestion, etc., to improve stability and activity. , to ensure efficient operation and ensure the effect of safety

Active Publication Date: 2021-09-24
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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  • A vehicle ad hoc network data security sharing and storage system based on blockchain technology
  • A vehicle ad hoc network data security sharing and storage system based on blockchain technology
  • A vehicle 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 present invention involves a large number of vehicles for data sharing, which is easy to be monitored and forged in the process of information interaction. The system needs a secure privacy protection method to ensure the accuracy and tamper-proof of information. Basic information from vehicle nodes must be authenticated and integrity checked before being authorized. Otherwise an attacker could substitute data or even impersonate another vehicle to broadcast false information. Therefore, in the consortium chain, the digital signature technology based on the bilinear pairing property of the elliptic curve is used to perform batch anonymous authentication on the message transmission in the vehicle ad hoc network. Correspondence (S02) and Figure 4 , the specific steps of digital signature will be introduced in detail below.

[0059] (1) Pre-distribution stage

[0060] Vehicle nodes and roadside unit nodes need to...

Embodiment 2

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

[0105] The roadside unit billing node of the consortium block chain of the present invention is responsible for collecting the interaction information uploaded by the vehicle within a certain period of time into the local storage device. And these records are encrypted and digitally signed, and then organized into blocks, such as (S04). figure 2 For the block chain structure in 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 (Bitcoin) system, bookkeeping nodes need to find a hash value that satisfies a certain degree of difficulty to provide effective proof-of-work.

[0106] A data block generally consists 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 timesta...

Embodiment 3

[0109] Example 3. Implementation of the consensus process.

[0110] The Practical Byzantine Fault Tolerance (PBFT) consensus mechanism is adopted in the consortium blockchain in the present invention. The consensus process is jointly completed by ordinary roadside unit nodes and leader (represented as Leader) roadside unit nodes. Leader is the master node in the consensus process, and other ordinary roadside unit nodes are slave nodes, such as (S05). Figure 5 It is the flowchart of the consensus process of the present invention, the leader broadcasts the data blocks it collects to the slave nodes for verification and review. Among the abnormal slave nodes, they are generally malicious nodes and faulty nodes, whose behavior is that they do not respond to the requests of 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 f=(n-1) / 3 abnormal nodes to exis...

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Abstract

A vehicle-mounted ad hoc network data security sharing and storage system based on blockchain technology, including vehicles, roadside units and trusted institutions. When the vehicle shares data with the roadside unit, it digitally signs the interaction information based on the bilinear algorithm on the elliptic curve to ensure the non-repudiation and integrity of the data. The roadside unit packs the collected data into blocks, and uses the Byzantine fault-tolerant consensus mechanism to make the data blocks reach a consensus agreement in the whole network, thereby improving the fault tolerance of the system and making it more stable. After a consensus is reached, the block will be sorted by the smart contract in the roadside unit and stored on the blockchain, and other consensus nodes will store the data synchronously. The system will award a corresponding amount of data coins to the roadside unit, and then the smart contract will distribute them to the vehicles that contribute data, so that the entire system remains active and stable.

Description

technical field [0001] The present invention belongs to the safe transmission and storage of vehicle ad hoc network (Vehicular Ad-Hoc Network, VANET) data, relates to the block chain technology in the field of information security, and the digital signature verification technology based on the bilinear pairing property on the elliptic curve . Background technique [0002] As a part of intelligent transportation system, vehicular ad hoc network improves traffic flow and reduces congestion, and provides convenient information services. Its goal is to provide self-organizing data transmission capabilities for vehicles on the road and realize applications such as assisted vehicle driving and safety warning. The traffic management center can reasonably allocate road resources through distributed synchronization and coordination. Therefore, in-vehicle ad hoc network will play an important role in the development of intelligent transportation system in order to ensure the safe an...

Claims

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Application Information

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Patent Type & Authority Patents(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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