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Fine-grained Database Field Search Using attribute-based encryption for E-Healthcare Clouds

JOURNAL OF MEDICAL SYSTEMS 2016年第11期40卷 235-235页

作者： Guo, Cheng Zhuang, Ruhan Jie, Yingmo Ren, Yizhi Wu, Ting Choo, Kim-Kwang Raymond Dalian Univ Technol Sch Software Technol Dalian Peoples R China Key Lab Ubiquitous Network & Serv Software Liaoni Dalian Peoples R China Hangzhou Dianzi Univ Sch Cyberspace Hangzhou Zhejiang Peoples R China Hangzhou Dianzi Univ Minist Educ China Key Lab Complex Syst Modeling & Simulat Hangzhou Zhejiang Peoples R China Univ Texas San Antonio Dept Informat Syst & Cyber Secur San Antonio TX USA Univ South Australia Sch Informat Technol & Math Sci Adelaide SA Australia China Univ Geosci Sch Comp Sci Wuhan Peoples R China

An effectively designed e-healthcare system can significantly enhance the quality of access and experience of healthcare users, including facilitating medical and healthcare providers in ensuring a smooth delivery of services. Ensuring the security of patients' electronic health records (EHRs) in the e-healthcare system is an active research area. EHRs may be outsourced to a third-party, such as a community healthcare cloud service provider for storage due to cost-saving measures. Generally, encrypting the EHRs when they are stored in the system (i.e. data-at-rest) or prior to outsourcing the data is used to ensure data confidentiality. Searchable encryption (SE) scheme is a promising technique that can ensure the protection of private information without compromising on performance. In this paper, we propose a novel framework for controlling access to EHRs stored in semi-trusted cloud servers (e.g. a private cloud or a community cloud). To achieve fine-grained access control for EHRs, we leverage the ciphertext-policy attribute-based encryption (CP-ABE) technique to encrypt tables published by hospitals, including patients' EHRs, and the table is stored in the database with the primary key being the patient's unique identity. Our framework can enable different users with different privileges to search on different database fields. Differ from previous attempts to secure outsourcing of data, we emphasize the control of the searches of the fields within the database. We demonstrate the utility of the scheme by evaluating the scheme using datasets from the University of California, Irvine.

关键词： Searchable encryption ciphertext-policy attribute-based encryption Cloud computing E-healthcare Access control

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An Access Control Model for Cloud Storage Using attribute-based encryption

An Access Control Model for Cloud Storage Using Attribute-Ba...

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IEEE Russia Section Young Researchers in Electrical and Electronic Engineering Conference (EIConRus)

作者： Sukhodolskiy, Ilya A. Zapechnikov, Sergey V. Natl Res Nucl Univ MEPhI Moscow Engn Phys Inst Dept Cryptol & Cybersecur Moscow Russia

ISBN: (纸本)9781509048656

In this work, we present a prototype of multi-user system for access control to datasets stored in a cloud. In the system, each user is assigned a set of attributes that characterize his identity in the system. The encrypted datasets to be shared among users are stored in the cloud, and the access control is provided by cryptographic methods. The basis of the system is multi-authority attribute-based encryption scheme. To improve security, our implementation supports a Certificate Authority, independent of Cloud Service Provider, and signed Revocation Lists. Our prototype can interoperate with existing cloud storage via API. The computational overhead is distributed among a large number of users, instead of assigning them to any particular party.

关键词： cloud storage attribute-based access control ciphertext-policy attribute-based encryption

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A NOVEL DYNAMIC KEY MANAGEMENT SCHEME FOR WIRELESS SENSOR NETWORKS

A NOVEL DYNAMIC KEY MANAGEMENT SCHEME FOR WIRELESS SENSOR NE...

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2011 4th IEEE International Conference on Broadband Network & Multimedia Technology(第四届IEEE宽带网络与多媒体国际会议 4th IEEE IC-BNMT2011)

作者： Chen Chen Zheng Huang Qiaoyan Wen Yajun Fan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

The key management of wireless sensor networks is one of the most important research topics for the secure communications. In light of the unique characteristics in Wireless sensor network such as large scale of deployment, mobility of nodes, node failures, communication failures and dynamic network topology, many dynamic key management schemes, such as SHELL and LOCK, have been proposed to guarantee the security of key management. But they could not completely address the collusion problem of key management in wireless sensor networks. In this paper, we devote to solving this problem and present a novel scheme for secure communications in wireless sensor networks. Our scheme follows the architecture of the three layers in LOCK. Concretely, we employ the ciphertext-policy attribute based encryption to refresh the group key in the upper layer and use EBS in the lower layer. Compared with related ones, our scheme can avoid the collusion attacks. Moreover, in the aspect of communication overhead, the number of messages for rekeying in our scheme can be largely reduced.

关键词： Wireless sensor networks Dynamic key management ciphertext-policy attribute-based encryption collusion-resistant

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attribute-based Weighted Keyword Search Scheme Supporting Multi-Search Mechanism in Fog Computing

Attribute-Based Weighted Keyword Search Scheme Supporting Mu...

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IEEE International Conference on Cyber Security and Cloud Computing (CSCloud)

作者： Shulan Wang Yuan Li Haiyan Wang Xi Zhang Jianyong Chen College of Big Data and Internet Shenzhen University Shenzhen P.R. China College of Computer Science and Software Engineering Shenzhen University Shenzhen P.R. China Cyberspace Security Research Center Peng Cheng Laboratory Shenzhen P.R. China

ISBN: (数字)9781728165509

ISBN: (纸本)9781728165516

With the popularity of intelligent terminal, fog computing as a new generation of internet technology can integrate the computing power of terminals and improve the effective utilization of social resources. At the same time, more and more data owners store ciphertext in the network. Hence, the advent of searchable encryption (SE) scheme enables searchers to search ciphertext without downloading all of it. However, the existing SE scheme cannot identify the matching degree of keywords and ciphertext. Besides, these schemes can only provide one or two search mechanism. In this paper, we propose a ciphertext-policy attribute-based weighted keyword searchable encryption scheme (ABWKS-MSM) in fog computing in order to solve the matching degree issue and provide multi-search mechanism, so that it becomes more friendly to fog computing applications. Furthermore, the proposed weighted keyword model can reduce the computational and storage cost. Finally, the performance analysis is also given, which proves that our scheme is efficient and feasible in fog computing.

关键词： Data security Searchable encryption Multisearch mechanism ciphertext-policy attribute-based encryption Fog computing ciphertext Data Security computer information security Scheme Key Search searcher Downloading computational power effective utilization KEYWORD cryptography

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A NOVEL DYNAMIC KEY MANAGEMENT SCHEME FOR WIRELESS SENSOR NETWORKS

A NOVEL DYNAMIC KEY MANAGEMENT SCHEME FOR WIRELESS SENSOR NE...

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2011 4th IEEE International Conference on Broadband Network and Multimedia Technology

作者： Chen Chen Zheng Huang Qiaoyan Wen Yajun Fan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

The key management of wireless sensor networks is one of the most important research topics for the secure *** light of the unique characteristics in Wireless sensor network such as large scale of deployment,mobility of nodes,node failures,communication failures and dynamic network topology,many dynamic key management schemes,such as SHELL and LOCK,have been proposed to guarantee the security of key *** they could not completely address the collusion problem of key management in wireless sensor *** this paper,we devote to solving this problem and present a novel scheme for secure communications in wireless sensor *** scheme follows the architecture of the three layers in LOCK. Concretely,we employ the ciphertext-policy attribute based encryption to refresh the group key in the upper layer and use EBS in the lower layer. Compared with related ones,our scheme can avoid the collusion ***,in the aspect of communication overhead,the number of messages for rekeying in our scheme can be largely reduced.

关键词： Wireless sensor networks Dynamic key management ciphertext-policy attribute-based encryption collusion-resistant

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Multi-keyword Ranked Searchable encryption Supporting CP-ABE Test

Multi-keyword Ranked Searchable Encryption Supporting CP-ABE...

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IEEE International Conference on Computing, Communications and IoT Applications

作者： Chuxin Wu Hongwei Liu Peng Zhang Yuhong Liu ATR Key Laboratory of National Defense Technology College of Electronics and Information Engineering Shenzhen University Shenzhen Technology University Department of Computer Engineering Santa Clara University

ISBN: (数字)9781728119731

ISBN: (纸本)9781728119748

Internet of Things (IoT) and cloud computing are promising technologies that change the way people communicate and live. As the data collected through IoT devices often involve users' private information and the cloud is not completely trusted, users' private data are usually encrypted before being uploaded to cloud for security purposes. Searchable encryption, allowing users to search over the encrypted data, extends data flexibility on the premise of security. In this paper, to achieve the accurate and efficient ciphertext searching, we present an efficient multi-keyword ranked searchable encryption scheme supporting ciphertext-policy attribute-based encryption (CP-ABE) test (MRSET). For efficiency, numeric hierarchy supporting ranked search is introduced to reduce the dimensions of vectors and matrices. For practicality, CP-ABE is improved to support access right test, so that only documents that the user can decrypt are returned. The security analysis shows that our proposed scheme is secure, and the experimental result demonstrates that our scheme is efficient.

关键词： Searchable encryption Multi-keyword search Ranked search ciphertext-policy attribute-based encryption cryptography Clouds Consumers Cloud Computing PREMISES access privileges Security Scheme

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Multi-authority attribute-based encryption scheme with constant-size ciphertexts and user revocation

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CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2019年第21期31卷

作者： Zhang, Xiao Wu, Faguo Yao, Wang Wang, Zhao Wang, Wenhua Beihang Univ Sch Math & Syst Sci Beijing 100191 Peoples R China Beihang Univ Ecole Cent Pekin Sino French Engineer Sch Beijing Peoples R China Minist Educ Key Lab Math Informat & Behav Semant Beijing Peoples R China Beihang Univ Beijing Adv Innovat Ctr Big Data & Brain Comp Beijing Peoples R China AVIC Econ & Technol Res Estab Beijing Peoples R China

ciphertext-policy attribute-based encryption (CP-ABE) is regarded as one of the most suitable technologies for data access control in cloud storage system. It gives data owners direct and flexible control on access policies. However, there still exists practicality concerns in CP-ABE applications, for example, the key escrow problem, user revocability, and large ciphertext size. Considering these problems, we propose a multi-authority attribute-based encryption scheme with constant-size ciphertexts and user revocation for threshold access policy in this paper. The security proof shows that the proposed scheme is selectively secure under the augmented multi-sequence of exponents decisional Diffie-Hellman assumption, and it also achieves forward security, backward security, and collusion-resistance.

关键词： ciphertext-policy attribute-based encryption multi-authority attribute-based encryption threshold access policy user revocation

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AC-AC: Dynamic revocable access control for acute care teams to access medical records

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Smart Health 2021年 20卷

作者： T. de Oliveira, Marcela Dang, Hai-Van A. Reis, Lúcio H. Marquering, Henk A. D. Olabarriaga, Sílvia Amsterdam University Medical Centers – University of Amsterdam Amsterdam Netherlands University of Westminster London United Kingdom

Acute care demands the collaboration of multiple healthcare professionals and various organisations. During an emergency, the availability of Electronic Medical Records (EMR) allows acute care teams to access a patient's data promptly, which facilitates the decision-making process. Cloud solutions offer an environment to store and share patients' EMR. However, security and privacy issues arise, which affect the availability of the patients' EMR. Inspired by a hybrid encryption scheme combining Dynamic index-based Symmetric Searchable encryption (DSSE) and attribute-based encryption (ABE), we proposed the data Access Control for Acute Care teams (AC-AC). AC-AC is a dynamic revocable access control protocol that enables break-glass access for an authorised member of an acute care team that is treating the patient. The proposed protocol allows a team to grant and revoke access for other teams to the patient's EMR dynamically according to the treatment's demands. We present a formal security analysis proving that AC-AC protocol is resilient to multiple attacks. Finally, we analysed the overhead in time complexity for the protocol execution and experimented with each algorithm. The experimental expected execution time for the AC-AC algorithms was below 170 ms, therefore feasible for an acute care timeline. © 2021 The Authors

关键词： Break-glass access ciphertext-policy attribute-based encryption Electronic medical records Emergency care Searchable symmetric encryption

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Secure Blockchain Assisted attribute-based Keyword Search for Collaborative E-Healthcare

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Distributed Ledger Technologies: Research and Practice 1000年

作者： Kasturi Routray Abhiram Manikonda Padmalochan Bera Indian Institute of Technology Bhubaneswar India

In the age of technological advancement, collaborative E-healthcare emerges as a transformative system eliminating traditional location and accessibility barriers in healthcare services. Here, Searchable encryption (SE) plays a key role in enabling healthcare providers to outsource encrypted medical data and search services to third parties like cloud servers, thereby reducing storage and management expenses. This intermediary approach poses challenges of single-point failure, privacy breaches, and potentially untrustworthy results. State-of-the-art public key-based SE methods use a cloud-assisted architecture that doesn’t support reliable and practical searches with fine-grained permissions. Also, such systems require additional support to address potential privacy leakages and ensure data availability at the storage server. To address these concerns, we propose a Blockchain-assisted Efficient and Secure Keyword Search (BESKS) scheme to enforce fine-grained keyword search privilege control while achieving practical search complexity. Our scheme employs a ciphertext policy attribute-based keyword search mechanism where keywords are encrypted using expressive access policies to build an inverted index structure. The encrypted indexes are stored on the blockchain while encrypted medical documents are stored on InterPlanetary File System (IPFS) nodes to enhance availability and ensure the reliability and scalability of our approach. Our scheme utilizes blockchain-based smart contract for efficient, secure search operations and ensures financial fairness in fine-grained searches. Search tokens are generated based on user attributes and query keywords to facilitate private searches on-chain. To enhance the search process, our secure index enables exact match for a query keyword in constant time to ensure expensive authorization operations are performed only once. Theoretical analysis suggests that our BESKS is more efficient and secure than state-of-the-art schemes. Prot

关键词： Blockchain Fine-grained Search Authorization ciphertext-policy attribute-based encryption Outsourced Keyword Search Reliability IPFS

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