| 基于同态加密和区块链技术的车联网隐私保护方案 |
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| 作者姓名： | 王瑞锦 唐榆程 张巍琦 张凤荔 |
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| 作者单位： | 1. 电子科技大学信息与软件工程学院，四川 成都 610054;2. 网络与数据安全四川省重点实验室，四川 成都 610054 |
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| 基金项目： | 国家自然科学基金资助项目(No.61802033,No.61472064,No.61602096);四川省科技计划基金资助项目(No.2018GZ0087,No.2019YJ0543);博士后基金资助项目(No.2018M643453);广东省国家重点实验室基金资助项目(No.2017B030314131);网络与数据安全四川省重点实验室开放课题基金资助项目(No.NDSMS201606)。 |
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| 摘 要： | 为了解决传统车联网设备安全性相对较低可能威胁到用户隐私的问题，提出了一种基于同态加密和区块链技术的车联网隐私保护方案。此方案将由二级节点组成的验证服务添加到所提模型中，以实现模型中角色的权限控制。为了记录车联网设备信息，设计基于同态加密（HEBDS）新的块数据结构，使隐私数据可以经过 Paillier 加密算法处理后再写入区块，并由获得记账权的网关节点写入区块链网络。该方案实现了数据在密文状态下的处理，弥补了区块链网络中全部数据公开的不足。通过对该方案的安全性分析，证明此方案具有不可伪造、隐私数据安全等特性。该方案通过对隐私数据的同态加密处理再上传区块链网络，实现隐私数据以密文状态分发、共享和计算，比传统车联网模型更能有效保护用户隐私。
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| 关 键 词： | 区块链 同态加密 车联网 隐私保护 |
Privacy protection scheme for internet of vehicles based on homomorphic encryption and block chain technology |
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| Authors: | WANG Ruijin TANG Yucheng ZHANG Weiqi ZHANG Fengli |
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| Affiliation: | 1. School of Information and Software Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;2. Network and Data Security Key Laboratory of Sichuan Province,Chengdu 610054,China |
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| Abstract: | In order to solve the problem that the security of traditional internet of vehicles devices is relatively low, which may threaten the privacy of users, a privacy protection scheme based on homomorphic encryption and blockchain technology was proposed. This scheme added the authentication service composed of two level nodes to the proposed model to realize the permission control of roles in the model. In order to record the information of the internet of vehicles devices, a new block data structure based on homomorphic encryption(HEBDS) was proposed, which enabled the privacy data to be written into the block after being processed by the Paillier encryption algorithm, and then written into the blockchain network by the gateway node obtaining the accounting right. This scheme realized the data processing in ciphertext state, and made up for the shortage of all data disclosure in blockchain network. Through the analysis of the security of the scheme, it is proved that the scheme has the characteristics of unforgeability and privacy data security. Through homomorphic encryption of privacy data and upload to blockchain network, the scheme can distribute, share and calculate privacy data in ciphertext state, which can protect customer privacy more effectively than traditional internet of vehicles model. |
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| Keywords: | blockchain homomorphic encryption internet of vehicle privacy protection |
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