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Second-hand car information sharing method based on block chain

A technology for information sharing and used cars, applied in the field of blockchain, it can solve the problems of increased blockchain load, limited blockchain scalability, leakage of user private keys, etc., so as to reduce the load and reduce query communication. Overhead, the effect of solving key leakage

Pending Publication Date: 2021-09-24
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this scheme issues keys to car owners, the centralized key issuing authority is vulnerable to malicious attacks and leaks the user's private key; in addition, in terms of data storage, the complete car data is directly stored on the blockchain, with the block size The increase of the blockchain will increase the load of the blockchain, and the scalability of the blockchain will be limited.

Method used

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  • Second-hand car information sharing method based on block chain
  • Second-hand car information sharing method based on block chain

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Embodiment Construction

[0042] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0043] The technical scheme that the present invention solves the problems of the technologies described above is:

[0044] A block chain-based second-hand car information sharing method, which comprises the following steps:

[0045] 101. The system server selects a security parameter λ, and after inputting the system security parameter, outputs the system public parameter paramas. First, select the bilinear map, e:G 1 ×G 2 →G T Among them, G 1 The generator is g,h, in G 1 It is not feasible to calculate the discrete logarithm based on g. G T The order is q. Let the hash function H 1 :{0,1} * →G 1 ,H 2 :G T →G 1 . Let N represent the number of all authorities in the system, so the public pa...

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Abstract

The invention discloses a block chain-based second-hand car information sharing method, which comprises the following steps that: firstly, safe sharing and private storage of car information by a car owner in a distributed network environment are designed, and car data cannot be tampered once being linked, so that the authority and the openness of second-hand car data information can be effectively improved; then, a distributed key generation technology is used for replacing a traditional private key generation mechanism (PKG) to issue keys to all large automobile organizations and automobile owners, and the problem that the PKG is attacked and leaks user private keys can be avoided; and finally, on-chain and off-chain distributed storage, on-chain storage data hash and off-chain distributed database storage of complete data information of the vehicle are carried out on vehicle data storage, and the problem that the data load capacity is large along with increase of the block size can be relieved through the on-chain and off-chain distributed storage design. Safety analysis and experimental simulation verify the feasibility and effectiveness of the proposed scheme.

Description

technical field [0001] The invention belongs to the technical field of block chains, in particular to a method for sharing second-hand car information based on block chains. Background technique [0002] With the increase of car ownership in my country, the second-hand car trading market has been active in recent years. However, in the existing second-hand car trading platforms, there are often cases where the condition of the car does not match the description. Some second-hand car sellers sometimes It will conceal the real use record of the vehicle. The existence of this situation has brought great obstacles to the development of the second-hand car market. To reduce the impact on the healthy development of the market, the key factor is to break the information asymmetry. [0003] There are many applications of blockchain in traceability, but there are few studies in the field of used car traceability. Mohammad et al. designed a blockchain-based used car history record mode...

Claims

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Application Information

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IPC IPC(8): H04L9/32H04L9/08H04L9/30H04L29/06H04L29/08G06F16/27
CPCH04L9/3239H04L9/0861H04L9/3066H04L9/3247H04L63/12H04L63/0428H04L67/1097H04L67/1095G06F16/27H04L9/50
Inventor 罗文俊熊瑞
Owner CHONGQING UNIV OF POSTS & TELECOMM
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