Secure and Efficient Data Storage and Sharing Scheme Based on Double Blockchain
作者机构：College of Information EngineeringYangzhou UniversityYangzhou225127China School Math&Computer ScienceQuanzhou Normal UniversityQuanzhou362000China Division of Computer ScienceUniversity of AizuAizu–Wakamatsu9658580Japan Key Laboratory of Intelligent Computing and Signal Processing of Ministry of EducationSchool of Computer Science and TechnologyAnhui UniversityHefei230601China Medical College of Yangzhou UniversityYangzhou225001China Department of Gynecology and ObstetricsAffiliated Hospital of Yangzhou UniversityYangzhouChina Department of Computer Software EngineeringSoonchunhyang UniversityAsanKorea
出 版 物：《Computers, Materials & Continua》 (计算机、材料和连续体（英文）)
年 卷 期：2021年第66卷第1期
页 面：499-515页
核心收录：
学科分类：08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：the Natural Science Foundation of Heilongjiang Province of China under Grant No.LC2016024 Natural Science Foundation of the Jiangsu Higher Education Institutions Grant No.17KJB520044 Six Talent Peaks Project in Jiangsu Province No.XYDXX–108
主 题：Cloud storage blockchain electronic medical records access control data sharing privacy
摘 要：In the digital era,electronic medical record(EMR)has been a major way for hospitals to store patients’medical *** traditional centralized medical system and semi-trusted cloud storage are difficult to achieve dynamic balance between privacy protection and data *** storage capacity of blockchain is limited and single blockchain schemes have poor scalability and low *** address these issues,we propose a secure and efficient medical data storage and sharing scheme based on double *** our scheme,we encrypt the original EMR and store it in the *** storage blockchain stores the index of the complete EMR,and the shared blockchain stores the index of the shared part of the *** with different attributes can make requests to different blockchains to share different parts according to their own *** experiments,it was found that cloud storage combined with blockchain not only solved the problem of limited storage capacity of blockchain,but also greatly reduced the risk of leakage of the original *** Extraction Signature(CES)combined with the double blockchain technology realized the separation of the privacy part and the shared part of the original *** symmetric encryption technology combined with Ciphertext-Policy Attribute-Based Encryption(CP–ABE)not only ensures the safe storage of data in the cloud,but also achieves the consistency and convenience of data update,avoiding redundant backup of *** analysis and performance analysis verified the feasibility and effectiveness of our scheme.
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