基于区块链的安全车联网数字取证系统

doi:10.11959/j.issn.2096-3750.2020.00169

物联网学报 ›› 2020, Vol. 4 ›› Issue (2): 49-57.doi: 10.11959/j.issn.2096-3750.2020.00169

所属专题：区块链

• 专题：区块链赋能物联网 • 上一篇下一篇

基于区块链的安全车联网数字取证系统

李萌¹,司成祥²,祝烈煌³()

¹ 合肥工业大学，安徽合肥 230601
² 国家计算机网络应急技术处理协调中心，北京 100029
³ 北京理工大学，北京 100081

修回日期:2020-04-26 出版日期:2020-06-30 发布日期:2020-06-12
作者简介:李萌（1988- ），男，安徽合肥人，博士，合肥工业大学副研究员，主要研究方向为应用密码学、安全与隐私、车联网、工业物联网、边缘计算、区块链等|司成祥（1982- ），男，山东郯城人，博士，国家计算机网络应急技术处理协调中心工程师，主要研究方向为网络安全|祝烈煌（1976- ），男，浙江衢州人，博士，北京理工大学教授，主要研究方向为物联网、云计算安全、区块链等
基金资助:
“十三五”装备预先研究项目(31511020401);安徽省科技重大专项项目(201903a05020016);国家自然科学基金资助项目(U1836102)

Secure vehicular digital forensics system based on blockchain

Meng LI¹,Chengxiang SI²,Liehuang ZHU³()

¹ Hefei University of Technology,Hefei 230601,China
² National Internet Emergency Center,Beijing 100029,China
³ Beijing Institute of Technology,Beijing 100081,China

Revised:2020-04-26 Online:2020-06-30 Published:2020-06-12
Supported by:
The Pre-study Foundation of Weapons and Equipment(31511020401);The Anhui Science and Technology Key Special Program(201903a05020016);The National Natural Science Foundation of China(U1836102)

摘要/Abstract

摘要：

车联网大数据的出现对更好地理解车联网特点、掌握车联网用户需求和提升车联网服务质量具有极大的推动作用，然而恶意用户甚至不法分子利用车联网进行非法行为，造成车联网服务质量下降以及车联网事故难以定责。同时，在车联网数字取证过程中，还存在一些安全和隐私问题，如数据提供者的身份隐私和数据访问者的请求权限问题。因此，提出了一种基于区块链的安全车联网数字取证方案。首先数据请求者在一个证书中心注册后获得匿名证书，用于后续的数据上传。然后数据访问者注册后获得公私钥对和用户密钥，分别用于数据请求和数据解密，只有其属性满足特定要求才能解密得到正确证据。接下来可信度较高的若干个机构联合建立一个区块链，记录车联网取证过程中所有的数据上传交易和数据访问交易。最后，对方案的安全和隐私进行分析，并在以太坊平台上对其性能进行实验分析。

关键词: 车联网, 数字取证, 区块链, 安全, 隐私

Abstract:

The emergence of vehicular big data has brought a great promotion to better understand characteristics of vehicular networks,grasp needs of users and improve service qualities.However,malicious users and criminals leverage vehicular networks to conduct illegal behaviors,resulting in a decline in the service quality and difficulties in determining the liability in vehicle accidents.At the same time,there are still some security and privacy issues in the vehicular digital forensics,such as the identity privacy of the data provider and the request control of the data requester.Therefore,a secure vehicular digital forensics scheme based on blockchain was proposed.Firstly,a data requester registered with a certificate authority and an anonymous certificate was obtained for the subsequent data uploading.Then,the data user obtained the public-private key pair and user key in registration,which were respectively used for the data requesting and data decryption.Only if certain attributes were held,the right plaintext could be decrypted.Next,a consortium blockchain was jointly established by several institutions with high credibility to record all data transactions.Finally,the security and privacy were experimentally analyzed,and the performance was tested based on the Ethereum platform.

Key words: vehicular networks, digital forensics, blockchain, security, privacy

中图分类号:

TP393.08

李萌,司成祥,祝烈煌. 基于区块链的安全车联网数字取证系统[J]. 物联网学报, 2020, 4(2): 49-57.

Meng LI,Chengxiang SI,Liehuang ZHU. Secure vehicular digital forensics system based on blockchain[J]. Chinese Journal on Internet of Things, 2020, 4(2): 49-57.

图/表 5

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实体	通信代价/KB
数据提供者	1.46
RSU	1.15N ₁+0.375N₂
数据访问者	0.26

基于区块链的安全车联网数字取证系统

Secure vehicular digital forensics system based on blockchain

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