Blockchain‑based electronic medical record secure sharing

doi:10.11772/j.issn.1001-9081.2021111895

Journal of Computer Applications ›› 2022, Vol. 42 ›› Issue (11): 3465-3472.DOI: 10.11772/j.issn.1001-9081.2021111895

• 2021 CCF China Blockchain Conference （CCF CBCC 2021） • Previous Articles

Blockchain‑based electronic medical record secure sharing

Chao LIN¹, Debiao HE²(), Xinyi HUANG¹

^1.College of Computer and Cyber Security，Fujian Normal University，Fuzhou Fujian 350117，China
^2.School of Cyber Science and Engineering，Wuhan University，Wuhan Hubei 430072，China

Received:2021-11-09 Revised:2021-12-18 Accepted:2022-01-05 Online:2022-01-19 Published:2022-11-10
Contact: Debiao HE
About author:LIN Chao， born in 1991， Ph. D.， lecturer. His research interests include applied cryptography， blockchain.
HE Debiao， born in 1980， Ph. D.， professor. His research interests include applied cryptography， cryptographic protocol， cloud computing security.
HUANG Xinyi， born in 1981， Ph. D.， professor. His research interests include applied cryptography， network security.
Supported by:
National Natural Science Foundation of China(62102089);Fundamental Research Funds for Central Universities(2042021kf1030)

基于区块链的电子医疗记录安全共享

林超¹, 何德彪²(), 黄欣沂¹

^1.福建师范大学计算机与网络空间安全学院，福州 350117
^2.武汉大学国家网络安全学院，武汉 430072

通讯作者: 何德彪
作者简介:林超（1991—），男，福建平和人，讲师，博士，CCF会员，主要研究方向：应用密码学、区块链
何德彪（1980—），男，山东聊城人，教授，博士，CCF会员，主要研究方向：应用密码学、安全协议、云计算安全 hedebiao@163.com
黄欣沂（1981—），男，江苏仪征人，教授，博士，CCF会员，主要研究方向：应用密码学、网络安全。
基金资助:
国家自然科学基金资助项目(62102089);中央高校基本科研业务费专项资金资助项目(2042021kf1030)

Abstract

Abstract:

To solve various issues faced by Electronic Medical Record （EMR） sharing， such as centralized data provider， passive patient data management， low interoperability efficiency and malicious dissemination， a blockchain-based EMR secure sharing method was proposed. Firstly， a more secure and efficient Universal Designated Verifier Signature Proof （UDVSP） scheme based on the commercial cryptography SM2 digital signature algorithm was proposed. Then， a smart contract with functionalities of uploading， verification， retrieval and revocation was designed， and a blockchain-based EMR secure sharing system was constructed. Finally， the feasibilities of UDVSP scheme and sharing system were demonstrated through security analysis and performance analysis. The security analysis shows that the proposed UDVSP is probably secure. The performance analysis shows that compared with existing UDVSP/UDVS schemes， the proposed UDVSP scheme saves the computation cost at least 87.42% and communication overhead at least 93.75%. The prototype of blockchain smart contract further demonstrates the security and efficiency of the sharing system.

Key words: Electronic Medical Record (EMR), blockchain, SM2 digital signature algorithm, universal designated verifier signature proof, data sharing

摘要：

针对电子医疗记录（EMR）共享面临的数据提供商集权化、患者数据管理显被动、互操作效率低、恶意传播等问题，提出一种基于区块链的电子医疗记录安全共享方法。首先，基于商用密码SM2数字签名算法提出一种更加安全高效的泛指定验证者签名证明（UDVSP）方案；然后，设计具有上传、验证、检索、撤销等功能的智能合约，构造基于区块链的电子医疗记录安全共享系统；最后，通过安全性分析和性能分析论证UDVSP方案和共享系统的可行性。安全性分析结果表明，所设计的UDVSP方案满足可证明安全性。性能评估结果表明，与现有常用的UDVSP/UDVS方案相比，节省至少87.42%的计算开销和93.75%的通信代价。区块链智能合约原型系统的仿真结果进一步论证了共享系统的安全性和高效性。

关键词: 电子医疗记录, 区块链, SM2数字签名算法, 泛指定验证者签名证明, 数据共享

CLC Number:

TP309.2

Chao LIN, Debiao HE, Xinyi HUANG. Blockchain‑based electronic medical record secure sharing[J]. Journal of Computer Applications, 2022, 42(11): 3465-3472.

林超, 何德彪, 黄欣沂. 基于区块链的电子医疗记录安全共享[J]. 《计算机应用》唯一官方网站, 2022, 42(11): 3465-3472.

Figures/Tables 6

Fig. 1 Universal architecture of blockchain-based EMR sharing

Fig. 2 System model

Fig. 3 Gas cost of smart contract algorithms

Tab. 1 Theoretical performance comparison results

方案	计算开销					通信代价
方案	UKGen	USign	UVerf	UTran	UIVerf	UIVerf
UDVSP-1^［10］	$T g 1 s m$	$T h 2 p + T g 1 s m$	$2 T b p + T h 2 p$	$T g 1 s m$	$2 T b p + T m m + T m a + 2 T e b p + T m b p + T h 2 p$	$G T + 2 Z n$
UDVSP-2^［10］	$2 T g 2 s m$	$T g 1 s m + T m i + T m m + 2 T m a$	$2 T b p + 2 T g 2 s m + 2 T g 2 p a$	$T g 1 s m$	$2 T b p + 2 T g 2 s m + 2 T g 2 p a + T e b p + T m m + T m a + 2 T e b p + T m b p$	$G T + 2 Z n$
UDVS-1^［15］	$4 T g 1 s m$	$3 T g 1 s m + 2 T g 1 p a + T m m$	$T g 1 s m + T g 1 p a + 3 T b p + T m b p$	$2 T g 1 s m + T m m + 3 T g 1 p a + T b p$	$T g 1 s m + T g 1 p a + 2 T b p + T m b p + 2 T e b p$	$G T + G 1$
UDVS-2^［17］	$2 T g 1 s m$	$5 T g 1 s m + 3 T g 1 p a$	$2 T g 1 s m + 3 T g 1 p a + 3 T b p + T m b p$	$T b p$	$2 T g 1 s m + 3 T g 1 p a + 2 T b p + T m b p + 2 T e b p$	$G T + G 1$
本文UDVSP	$T g 1 s m$	$T g 1 s m + T m i + T h + 2 T m m + 2 T m a$	$2 T g 1 s m + T g 1 p a + 2 T m a + T h$	$3 T m a + T h$	$14 T g 1 s m + 13 T g 1 p a + 7 T m m + 3 T m a + T h$	$2 Z n$

Tab. 1 Theoretical performance comparison results

方案	计算开销					通信代价
方案	UKGen	USign	UVerf	UTran	UIVerf	UIVerf
UDVSP-1^［10］	$T g 1 s m$	$T h 2 p + T g 1 s m$	$2 T b p + T h 2 p$	$T g 1 s m$	$2 T b p + T m m + T m a + 2 T e b p + T m b p + T h 2 p$	$G T + 2 Z n$
UDVSP-2^［10］	$2 T g 2 s m$	$T g 1 s m + T m i + T m m + 2 T m a$	$2 T b p + 2 T g 2 s m + 2 T g 2 p a$	$T g 1 s m$	$2 T b p + 2 T g 2 s m + 2 T g 2 p a + T e b p + T m m + T m a + 2 T e b p + T m b p$	$G T + 2 Z n$
UDVS-1^［15］	$4 T g 1 s m$	$3 T g 1 s m + 2 T g 1 p a + T m m$	$T g 1 s m + T g 1 p a + 3 T b p + T m b p$	$2 T g 1 s m + T m m + 3 T g 1 p a + T b p$	$T g 1 s m + T g 1 p a + 2 T b p + T m b p + 2 T e b p$	$G T + G 1$
UDVS-2^［17］	$2 T g 1 s m$	$5 T g 1 s m + 3 T g 1 p a$	$2 T g 1 s m + 3 T g 1 p a + 3 T b p + T m b p$	$T b p$	$2 T g 1 s m + 3 T g 1 p a + 2 T b p + T m b p + 2 T e b p$	$G T + G 1$
本文UDVSP	$T g 1 s m$	$T g 1 s m + T m i + T h + 2 T m m + 2 T m a$	$2 T g 1 s m + T g 1 p a + 2 T m a + T h$	$3 T m a + T h$	$14 T g 1 s m + 13 T g 1 p a + 7 T m m + 3 T m a + T h$	$2 Z n$

Tab. 2 Symbol difinition and time cost

符号	描述	时间/ms	符号	描述	时间/ms
$T g 1 s m$	群 $G 1$ 上的点乘运算	35.311 100	$T b p$	群 $G T$ 上的双线性对运算	820.320 00
$T g 2 s m$	群 $G 2$ 上的点乘运算	206.575 000	$T e b p$	群 $G T$ 上的模幂运算	689.273 00
$T g 1 p a$	群 $G 1$ 上的点加运算	0.165 954	$T m b p$	群 $G T$ 上的模乘运算	2.058 55
$T g 2 p a$	群 $G 2$ 上的点加运算	206.575 000	$T m i$	域 $Z n *$ 上的模逆运算	0.050 23
$T h$	安全哈希函数	0.005 760	$T m m$	域 $Z n *$ 上的模乘运算	0.012 31
$T h 2 p$	全域哈希函数	17.146 400	$T m a$	域 $Z n *$ 上的模加运算	0.002 71

Tab. 2 Symbol difinition and time cost

符号	描述	时间/ms	符号	描述	时间/ms
$T g 1 s m$	群 $G 1$ 上的点乘运算	35.311 100	$T b p$	群 $G T$ 上的双线性对运算	820.320 00
$T g 2 s m$	群 $G 2$ 上的点乘运算	206.575 000	$T e b p$	群 $G T$ 上的模幂运算	689.273 00
$T g 1 p a$	群 $G 1$ 上的点加运算	0.165 954	$T m b p$	群 $G T$ 上的模乘运算	2.058 55
$T g 2 p a$	群 $G 2$ 上的点加运算	206.575 000	$T m i$	域 $Z n *$ 上的模逆运算	0.050 23
$T h$	安全哈希函数	0.005 760	$T m m$	域 $Z n *$ 上的模乘运算	0.012 31
$T h 2 p$	全域哈希函数	17.146 400	$T m a$	域 $Z n *$ 上的模加运算	0.002 71

Tab. 3 Real performance comparison results

方案	计算开销/ms					通信代价/B
方案	UKGen	USign	UVerf	UTran	UIVerf	UIVerf
UDVSP-1^［10］	35.311 1	52.457 5	1 657.786 4	35.311 1	3 038.406 0	2 048
UDVSP-2^［10］	413.150 0	35.379 1	2 055.055 7	35.311 1	4 124.948 0	2 048
UDVS-1^［15］	141.244 4	106.277 5	2 498.496 0	891.452 4	3 056.722 0	2 080
UDVS-2^［17］	70.622 2	178.454 2	2 534.139 0	820.320 0	3 092.365 0	2 080
本文UDVSP	35.311 1	35.397 1	70.799 3	0.013 8	496.612 9	128

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Blockchain‑based electronic medical record secure sharing

基于区块链的电子医疗记录安全共享

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