基于同态加密和区块链技术的车联网隐私保护方案

doi:10.11959/j.issn.2096-109x.2020011

Abstract

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 block chain 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.

Key words: blockchain, homomorphic encryption, internet of vehicle, privacy protection

CLC Number:

TP393

Ruijin WANG,Yucheng TANG,Weiqi ZHANG,Fengli ZHANG. Privacy protection scheme for internet of vehicles based on homomorphic encryption and block chain technology[J]. Chinese Journal of Network and Information Security, 2020, 6(1): 46-53.

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网关节点	行驶里程/公里	停车缴费金额/元	燃油流量/升
Gi_1	600	150	70
Gi_2	800	220	80
Gi_3	1 000	310	90
#	#	#	#
Gi_50	2 000	840	130

网关节点	行驶里程/公里	停车缴费金额/元	燃油流量/升
Gi_1	7263129731273912637021381237980207 9812630283791232198362170692092713 92136270361237632106217931	2653783173189267636734906726351038 1003762731239389403189239230189187 19301803178210319392837131	2653783173189267636734906726351038 1003762731239389403189239230189187 19301803178210319392837131
Gi_2	8731293710203964005487379812791078 1264981798126498174981708916238012 73891273981641647189130065	8398837810007382662918173219882738 7913077887783278738748710001237271 02739973287031023702378101	3092329040321390324128448717237130 3110219331378454536161819773281918 02103131737137813783912033
Gi_3	2721637812631961400912892100392817 2174672391294984017017037219831283 12312312312309	2093082310989312928312981098219832 1378211816166513727232789182388781 20012710231636	5256351820203782837118382272647197 8316191072137817200073818327182301 82181021811882
#	#	#	#
Gi_50	4090803291789217481671389182361923 7897412767127938763913891298382198 12941987972082	7398162736178713100192893213912823 7732728378746801012721029830210983 92893102018391	7610081023912376345546814183717300 3171873812637163714732378459589319 31621772900621

z	q=0.1	q=0.3
z=1	0.20458727394278242	0.627749109982254
z=2	0.05097789283933862	0.4457170995239838
z=3	0.013172241678896482	0.3245841018204811
z=4	0.0034552434664851736	0.2391268577972393
z=5	0.0009136821879279122	0.1773523113609451
z=10	0.0000012612862196786	0.04166047996897915

Privacy protection scheme for internet of vehicles based on homomorphic encryption and block chain technology

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