基于签密和区块链的车联网电子证据共享方案

doi:10.11959/j.issn.1000-436x.2021237

Abstract

Abstract:

To solve the problems of privacy and security in the electronic evidence sharing of Internet of vehicles， a sharing scheme of electronic evidence in the Internet of vehicles based on signcryption and blockchain was proposed.The evidence ciphertext and the evidence report were stored in the cloud server and the block chain respectively to realize the secure storage and sharing of the electronic evidence.The identity-based signcryption technology was used to ensure the confidentiality of data， and the proxy re-encryption technology was used to realize the sharing of electronic evidence of Internet of vehicles by insurance companies.The aggregation signature technique was introduced to reduce the computation cost of multi vehicle user signature verification.The reliability of electronic evidence was improved by using credibility incentive mechanism.Security analysis shows that the proposed scheme achieves data confidentiality， integrity， verifiability and unforgeability.Compared with the existing schemes， the proposed scheme has certain advantages in terms of computational overhead.

Key words: Internet of vehicles, electronic evidence, identity-based signcryption, proxy re-encryption, blockchain, sig-nature aggregation

CLC Number:

TP309.7

Xiaodong YANG, Wanting XI, Jiaqi WANG, Aijia CHEN, Caifen WANG. Electronic evidence sharing scheme of Internet of vehicles based on signcryption and blockchain[J]. Journal on Communications, 2021, 42(12): 236-246.

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References 24

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方案	代理密钥生成	加密	解密
Yu等方案	2M+2P+1E	3M+1P+1E	1M+4P+1E
Hundera等方案	2M+2P	2M	2M+4P
Luo等方案	2M+1P	2M+1P+3E	2M+1P+3E
本文方案	1P	4M+1P	1M+4P

验证方式	验证计算开销
单个签名验证	jM+ 2 jP
聚合签名验证	jM+ 2P

Electronic evidence sharing scheme of Internet of vehicles based on signcryption and blockchain

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