Keyword search over encrypted cloud data based on blockchain in smart medical applications

Niu, Shufen; Song, Mi; Fang, Lizhi; Yu, F. Richard; Han, Song; Wang, Caifen

doi:10.1016/j.comcom.2022.05.018

Cited by 17 publications

(14 citation statements)

References 31 publications

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“…Niu et al [40] proposed an ABSE scheme based on blockchain for multi-keyword searches. Data users search encrypted EHR files using multiple keywords.…”

Section: B Related Workmentioning

confidence: 99%

An Inner Product Predicate-Based Medical Data-Sharing and Privacy Protection System

Wu,

Wang,

Wan

et al. 2024

IEEE Access

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Searchable encryption is widely used in electronic health record systems because it enables users to search ciphertext data without decryption. However, the existing traditional searchable encryption schemes lack fine-grained access policies with wildcards in electronic health record systems. And they also do not consider the problem of hiding policies, as well as the problem of incomplete search results caused by cloud servers. In order to solve all the above problems, this paper proposes a blockchain-aided attribute-based searchable scheme with the properties of inner product predicate. In the proposed scheme, the attribute encryption mechanism implements fine-grained access policies with wildcards, which improves the data owner's ability to control access authorization precisely. Introducing the inner product predicate not only achieves fully hidden access policies but also prevents the leakage of sensitive medical data. The immutability of the blockchain ensures the integrity of multi-keyword search results, guaranteeing reliable data sharing. Finally, the security proof and the performance evaluation are conducted to confirm the security and effectiveness of the proposed scheme.INDEX TERMS Attribute-based searchable encryption, Fine-grained access policies with wildcards, Fully hidden, Inner-product predicate, Blockchain. I. INTRODUCTION A. BACKGROUND VOLUME 11, 2023

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“…Niu et al [40] proposed an ABSE scheme based on blockchain for multi-keyword searches. Data users search encrypted EHR files using multiple keywords.…”

Section: B Related Workmentioning

confidence: 99%

An Inner Product Predicate-Based Medical Data-Sharing and Privacy Protection System

Wu,

Wang,

Wan

et al. 2024

IEEE Access

View full text Add to dashboard Cite

show abstract

“…However, these schemes have limitations, such as scalability difficulties, security and performance bottlenecks, and the potential for excessive permissions, as they rely on a single authorization center. Niu et al [20] proposed a policy hide and verifiable blockchain-assisted ABSE scheme. This scheme stores the index is stored on the blockchain, and searches are performed using smart contracts, which reduces the computational load on the service.…”

Section: Search Encryptionmentioning

confidence: 99%

“…Despite the fact that the scheme [29] outsources encryption and decryption to save costs for the client, its overall computing cost is significant, and its impact is poor. Schemes [20] and BEM-ABSE support data integrity verification. Furthermore, BEM-ABSE runs ciphertext search via a smart contract and uploads the ciphertext index to the blockchain, which can better safeguard user privacy and data security.…”

Section: Guessmentioning

confidence: 99%

“…√ LSSS influences the size of the user's key and ciphertext. In comparison to methods [20] and [29], BEM-ABSE has less storage overhead during the key generation and ciphertext generation phases. It is worth noting that the storage cost in the trapdoor generation and search phase is constant, which has a significant advantage over the other two schemes.…”

Section: Guessmentioning

confidence: 99%

“…2b, scheme BEM-ABSE adopts an online/offline encryption mechanism. Note that although the BEM-ABSE scheme's computational cost during the encryption phase is larger than that of the scheme [20], the BEM-ABSE scheme uses intermediate ciphertexts for online encryption during DO usage in the encryption process rather than performing offline encryption every time during encryption.…”

Section: Experimental Analysismentioning

confidence: 99%

See 2 more Smart Citations

Efficient Multi-Authority Attribute-Based Searchable Encryption Scheme with Blockchain Assistance for Cloud-Edge Coordination

Liu,

He,

Zhao

et al. 2023

Computers, Materials &Amp; Continua

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Cloud storage and edge computing are utilized to address the storage and computational challenges arising from the exponential data growth in IoT. However, data privacy is potentially risky when data is outsourced to cloud servers or edge services. While data encryption ensures data confidentiality, it can impede data sharing and retrieval. Attribute-based searchable encryption (ABSE) is proposed as an effective technique for enhancing data security and privacy. Nevertheless, ABSE has its limitations, such as single attribute authorization failure, privacy leakage during the search process, and high decryption overhead. This paper presents a novel approach called the blockchain-assisted efficient multi-authority attribute-based searchable encryption scheme (BEM-ABSE) for cloudedge collaboration scenarios to address these issues. BEM-ABSE leverages a consortium blockchain to replace the central authentication center for global public parameter management. It incorporates smart contracts to facilitate reliable and fair ciphertext keyword search and decryption result verification. To minimize the computing burden on resource-constrained devices, BEM-ABSE adopts an online/offline hybrid mechanism during the encryption process and a verifiable edge-assisted decryption mechanism. This ensures both low computation cost and reliable ciphertext. Security analysis conducted under the random oracle model demonstrates that BEM-ABSE is resistant to indistinguishable chosen keyword attacks (IND-CKA) and indistinguishable chosen plaintext attacks (IND-CPA). Theoretical analysis and simulation results confirm that BEM-ABSE significantly improves computational efficiency compared to existing solutions.

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Fine-Grained Searchable Encryption Scheme Against Keyword Brute-Force Attacks

Feng,

Zeng,

Xiao

et al. 2024

Lecture Notes in Computer Science

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Keyword search over encrypted cloud data based on blockchain in smart medical applications

Cited by 17 publications

References 31 publications

An Inner Product Predicate-Based Medical Data-Sharing and Privacy Protection System

An Inner Product Predicate-Based Medical Data-Sharing and Privacy Protection System

Efficient Multi-Authority Attribute-Based Searchable Encryption Scheme with Blockchain Assistance for Cloud-Edge Coordination

Fine-Grained Searchable Encryption Scheme Against Keyword Brute-Force Attacks

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