A blockchain-based attribute-based signcryption scheme to secure data sharing in the cloud

Eltayieb, Nabeil; Elhabob, Rashad; Hassan, Alzubair; Li, Fagen

doi:10.1016/j.sysarc.2019.101653

Cited by 87 publications

(46 citation statements)

References 12 publications

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“…In addition, the use of ABE and AB-S improves the computational efficiency of the EHRs system. Scheme [54] combines the ABSC with blockchain technology to realize the secure sharing of cloud data. Compared with the "encryption then signature" adopted by Yang et al [53], there are higher savings in computing overhead and communication costs.…”

Section: Application Of Blockchain In Ehrsmentioning

confidence: 99%

“…The purpose of this section is to compare the performance of our BVOABSC scheme with the existing relevant ABSC schemes [42,47,49,50,52,54]. The complete EHRs owned by a patient are usually generated by multiple doctors, but most EHRs protection schemes only discuss the process of generating the EHR by one doctor.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…The results show that our scheme meets all the above requirements. Scheme [52] does not support the privacy protection of signcryptors, [42,50,52,54] cannot realize the outsourcing operations, and [52,54] is not verifiable. Only scheme [49] and our scheme have multiple authorities.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…Only scheme [49] and our scheme have multiple authorities. Scheme [52,54] and our scheme use blockchain technology This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…Content may change prior to final publication. [42] (se + 2ss + 3)E 1 (ss + 5)P + (2se + ss + 3)E 1 / [47] (10 + 2se + 6ss)E 1 + E T E 1 (ss + 2)E 1 + (2 + 2ss)P [49] (kE T ) + (4k + 5kse)E 1 (3k + 3kse)E 1 + E T + P 5E 1 + (10k + 3)E 2 + kE T + 8kP [50] (4 + 3se + 3ss)E 1 (5 + ss)P + 2seP / [52] (ss + 3)E 1 3P / [54] (2k + 2)E 1 + E 2 P / Ours [42] (ls + 8B G T + 4)B G 1 / (ls + le + 4)B G 1 [47] (ls + l d + 5)B G 1 (l d + 4)B G 1 2(le + ls + 2)B G 1 [49] (k + 9)B G 1 (k + 13)B G 1 (ls + 3le + 4)B G 1 + B G T [50] (2ls + 2l d + 4)B G 1 / (3ls + 3le + 5)B G 1 [52] (…”

Section: Performance Evaluationmentioning

confidence: 99%

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A Blockchain-Assisted Verifiable Outsourced Attribute-Based Signcryption Scheme for EHRs Sharing in the Cloud

Yang

et al. 2020

IEEE Access

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The sharing of electronic health records (EHRs) has shown great advantages in the accurate treatment of patients and the development of medical institutions. However, it is easy to cause some security problems in the process of medical data sharing. Generally, after a patient's EHRs are generated by different medical institutions, they are outsourced to the cloud server (CS) by the authorized medical institutions for storage, which causes the patient to lose control of EHRs. Moreover, malicious medical institutions and semi-trusted cloud servers may collude to tamper with EHRs to seek benefits, which threatens the integrity of EHRs. Therefore, we propose a blockchain-assisted verifiable outsourced attribute-based signcryption scheme (BVOABSC) which realizes the secure sharing of EHRs in a multi-authority cloud storge environment. Firstly, we use the attribute-based signcryption algorithm to realize the confidentiality and unforgeability of the EHRs and protect the privacy of the signer. Secondly, it greatly reduces the computational burden of users by using verifiable outsourcing computation mechanism. Most of the designcryption calculation is performed by the cloud server, and the correctness of the generated partial designcryption ciphertext is verified by users. Furthermore, we use blockchain technology to protect outsourced EHRs from tampering by illegal users. Specifically, each operation on outsourced EHRs is stored as a transaction on the public blockchain, which ensures that EHRs cannot be modified. At the same time, the auditor can verify the integrity of the outsourced EHRs by checking the corresponding transactions. In addition, the smart contract created by the patient can solve the problems in cloud storage, such as tampering EHRs and returning incorrect results. Finally, security analysis and performance evaluation show that the proposed BVOABSC scheme satisfies stronger security and higher efficiency than similar schemes. INDEX TERMS Attribute-based signcryption, blockchain, cloud storage, electronic health records, verifiable outsourced calculation.

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Section: Application Of Blockchain In Ehrsmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

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A Blockchain-Assisted Verifiable Outsourced Attribute-Based Signcryption Scheme for EHRs Sharing in the Cloud

Yang

et al. 2020

IEEE Access

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Privacy‐aware cloud ecosystems: Architecture and performance

Barati

Rana

2020

Concurrency and Computation

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With an increasing number of cloud providers offering services made use of by both individual users and other providers, there is a realization that service provision now involves an "ecosystem" of providers. Some providers may be directly visible to a user, while others may be contributors to composite services and not directly known to the user-as only the provider offering the composite service is visible. Such services may include: domain specific services (eg, simulation), advertising services, or profiling/analytics services. Understanding the impact on data privacy of a user for such a composite service remains a challenge, and providing transparency (and obtaining user consent for data use) remains a key requirement of the European General Data Protection Regulation (GDPR). An architecture that makes use of blockchains and smart contracts is proposed that addresses this requirement. An implementation of the architecture is used to demonstrate how access control can be managed and audited. The scalability and cost of undertaking access control, as the number of actors (both service providers and "voters") increases, is also described. The proposed approach can be used to support service aggregation across both private and public clouds. K E Y W O R D Sblockchain, cloud architecture, data privacy, general data protection regulation, smart contracts INTRODUCTIONWith increasing number of on-line services, often hosted over cloud infrastructure, there is a realization that such services can involve an interlinked set of cloud providers. To access a service, users primarily interact through a Web interface, and are (often) unaware of the larger collection of services that are made available behind the Web interface, and deployed across a distributed infrastructure. Users entrust their data without realizing that the providers may share their data with back-end services such as cloud hosted analytics and advertisers-the growth in Internet-connected devices adds further complexity to this challenge. In order to address this, the general data protection regulation (GDPR) is implemented to impose obligations on providers to ensure that consent is obtained from users before their data are made use of, thereby enabling nonexpert users to make informed decisions about their privacy. 1The key elements introduced in GDPR are a data subject, a controller or joint controller, and a processor. 2 The data subject is the data owner and the controller a person/organization specifying aims of processing a user's personal data. The notion of joint controller is introduced where two or more controllers jointly specify the purpose of data processing. Finally, the processor is responsible for processing personal data on behalfThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Blockchain‐cloud integration: Comprehensive survey and open research issues

Ghanmi,

Hajlaoui,

Touati

et al. 2024

Concurrency and Computation

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SummaryCloud computing has attracted great interest in various scientific and technical fields recently as one of the widely adopted networking technologies. Despite their many benefits and applications, it still faces many security and trust challenges, including managing and controlling services, privacy, data integrity in distributed databases, data backup, and synchronization. Moreover, due to its centralized architecture, and lack of transparency and traceability, the results of the trust assessment cannot be fully recognized by all users. However, creating a trust‐based transaction environment has become its key factor. Blockchain, with its nature of decentralization and security, can be leveraged to address these challenges and build a distributed and decentralized trust architecture, due to the underlying characteristics such as transparency, traceability, decentralization, security, immutability, and automation. This article makes a comprehensive study of how blockchain is applied to deliver security services in the cloud computing model, focusing on up‐to‐date approaches, opportunities, and future directions. This survey also discusses the benefits of the technical fusion of blockchain and cloud. It provides a classification of proposed systems based on privacy, data sharing, authentication, and access control, as well as auditing and data integrity. Finally, the main conclusions of this study will be the challenges and future directions to stimulate further research in this promising field.

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A blockchain-based attribute-based signcryption scheme to secure data sharing in the cloud

Cited by 87 publications

References 12 publications

A Blockchain-Assisted Verifiable Outsourced Attribute-Based Signcryption Scheme for EHRs Sharing in the Cloud

A Blockchain-Assisted Verifiable Outsourced Attribute-Based Signcryption Scheme for EHRs Sharing in the Cloud

Privacy‐aware cloud ecosystems: Architecture and performance

Blockchain‐cloud integration: Comprehensive survey and open research issues

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