基于公平盲签名和分级加密的联盟链隐私保护方案

doi:10.11959/j.issn.1000-436x.2022162

Abstract

Abstract:

To solve the security hazards of identity information and transaction data and the time-consuming problem of traditional single-level encryption methods in the current application scenarios of consortium blockchain, a privacy protection scheme of consortium blockchain based on fair blind signature and hierarchical encryption was proposed.Considering the strong centrality and poor security of the existing fair blind signature scheme, it was redesigned with zero-knowledge proof technology to be applicable for consortium blockchain application scenario.Based on the Paillier homomorphic encryption algorithm, a supervisable hierarchical encryption method was designed, and the method realized the supervision of encrypted transaction data information and reduced the time cost of the encryption and decryption process.The security analysis and simulation results show that the proposed scheme can effectively resist malicious attacks such as tampering and eavesdropping and significantly improve the encryption efficiency.

Key words: consortium blockchain, fair blind signature, zero-knowledge proof, homomorphic encryption, privacy protection, hierarchical encryption

CLC Number:

TP393

Xuewang ZHANG, Zhihong LI, Jinzhao LIN. Privacy protection scheme based on fair blind signature and hierarchical encryption for consortium blockchain[J]. Journal on Communications, 2022, 43(8): 131-141.

Figures/Tables 16

方案	加密理论时间开销	解密理论时间开销	加密体制	同态属性	密文可监管
文献[28]方案	$2 T_{E} + T_{X}$	$2 (T_{E} + T_{X})$	概率型	加法	是
文献[31]方案	$2 k (2 T_{E} + T_{X})$	$2 (T_{m} + k T_{E})$	概率型	加法	是
文献[32]方案	$T_{E}$	$T_{E}$	确定型	乘法	是
本文方案	$X % T_{SM4} + Y % (2 T_{E} + T_{X})$	$X % T_{SM4} + Y % 2 (T_{E} + T_{X})$	概率型	加法	是

References 32

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符号	含义

m	用户交易的原始交易数据
m'	经盲化处理后的交易数据
k	盲因子
(O_pub,O_prv)	组织机构ORG的密钥(公钥，私钥)
(T_pub,T_prv)	可信第三方TTP的密钥(公钥，私钥)
ω^?	组织机构ORG的签名
σ^?	可信第三方TTP的签名
Hash(?)	数据?的哈希值

设备	参数
CPU型号	AMD Ryzen 7 5800H
CPU主频/GHz	3.20
内存/GB	16
系统类型	Win10-64 bit
软件平台	IntelliJ IDEA ＆ JDK 1.8

文件大小/kbit	消耗时长/ms
文件大小/kbit	文献[28]方案	文献[31]方案	文献[32]方案	本文方案
5	19.161	37.132	6.723	5.173
10	37.718	75.923	12.684	10.002
15	55.892	109.851	14.015	13.746
20	62.902	129.55	18.762	16.714
25	87.91	166.82	22.516	23.619
30	95.725	189.345	26.271	25.272
35	111.94	219.876	31.151	29.485
40	125.856	253.451	36.417	33.167
45	140.121	277.623	39.438	36.931
50	150.85	303.67	43.787	39.043

文件大小/kbit		消耗时长/ms
文件大小/kbit	a	b	c
5	5.173	5.137	5.062
10	10.002	8.911	6.932
15	13.746	12.141	8.633
20	16.714	15.147	11.535
25	23.619	19.103	14.13
30	25.272	22.168	15.521
35	29.485	25.843	18.525
40	33.167	29.37	21.318
45	36.931	31.905	24.725
50	39.043	35.413	27.107

文件大小/kbit	消耗时长/ms
文件大小/kbit	文献[28]方案	文献[31]方案	文献[32]方案	本文方案
5	2.218	21.055	6.702	1.065
10	4.093	36.302	12.661	1.606
15	6.315	47.413	13.937	2.438
20	7.957	60.399	18.758	2.979
25	10.126	69.764	22.488	3.732
30	13.093	82.301	26.250	4.643
35	15.411	95.621	31.083	5.413
40	16.258	115.632	36.389	5.965
45	18.539	128.456	39.217	6.534
50	21.145	137.031	42.856	7.586

Privacy protection scheme based on fair blind signature and hierarchical encryption for consortium blockchain

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Figures/Tables 16

References 32

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方案	加密时长/ms	解密时长/ms	总时长/ms
文献[28]方案	150.85	21.145	171.995
文献[31]方案	303.67	137.031	440.701
文献[32]方案	43.787	42.856	86.643
本文方案	39.043	7.586	46.629

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