A Ciphertext-Policy Attribute-based Encryption Scheme With Optimized Ciphertext Size And Fast Decryption

Malluhi, Qutaibah M.; Shikfa, Abdullatif; Trinh, Viet Cuong

doi:10.1145/3052973.3052987

Cited by 42 publications

(20 citation statements)

References 25 publications

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“…In addition, the reliability of the converted ciphertext returned from the cloud server is not verified. To achieve practicability, feasibility, and verifiability in WBANs, we build a lightweight fine-grained keyword search system based on the scheme [23], which supports flexible access control and single keyword with lightweight and verifiable decryption.…”

Section: Related Workmentioning

confidence: 99%

“…On input an attribute set of a user, the public parameter , and the system master key , this algorithm creates the secret key for the user as follows: This algorithm first picks , ∈ Z and then computes the secret key for the user as = ( 0 = ( − − )/ , 1 = , 2 = , 3 = , { = ℎ } ∈D ). Note that user just requires to keep 1 secret and the rest of other secret key could be published to the public domain [23].…”

Section: ( mentioning

confidence: 99%

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A Lightweight Fine-Grained Search Scheme over Encrypted Data in Cloud-Assisted Wireless Body Area Networks

Cao

Wang

Qin

et al. 2019

Wireless Communications and Mobile Computing

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The wireless body area networks (WBANs) have emerged as a highly promising technology that allows patients' demographics to be collected by tiny wearable and implantable sensors. These data can be used to analyze and diagnose to improve the healthcare quality of patients. However, security and privacy preserving of the collected data is a major challenge on resource-limited WBANs devices and the urgent need for fine-grained search and lightweight access. To resolve these issues, in this paper, we propose a lightweight fine-grained search over encrypted data in WBANs by employing ciphertext policy attribute based encryption and searchable encryption technologies, of which the proposed scheme can provide resource-constraint end users with fine-grained keyword search and lightweight access simultaneously. We also formally define its security and prove that it is secure against both chosen plaintext attack and chosen keyword attack. Finally, we make a performance evaluation to demonstrate that our scheme is much more efficient and practical than the other related schemes, which makes the scheme more suitable for the real-world applications.

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Section: Related Workmentioning

confidence: 99%

Section: ( mentioning

confidence: 99%

A Lightweight Fine-Grained Search Scheme over Encrypted Data in Cloud-Assisted Wireless Body Area Networks

Cao

Wang

Qin

et al. 2019

Wireless Communications and Mobile Computing

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“…Secret-key Public-key Signing Verifying [3] 1|G| 1|G| + 1| | 2|G| + + 3 3P + 1H [4] 1|G|+ 1| | 2| | 2|G| 2 + 2 ( + 3)exp + 2H [5] ( + 1)|G| 1|G|+ 1| | 2|G| 4 exp + 3 H 2 exp + 3P (3 + 1)H Ours 3|G|+ 1|G| 3|G|+ 1| | 3|G|+ (n + 3)|G| (2 + 9)exp + (2 + 1)H ( + 1)exp + 3P+(2 + 1)H time. Second, using direct approach [14,15], which leads to quite efficient resulted schemes (constant-size of both public parameters and signature, as well as efficient computing time); however these schemes are only secure under strong assumptions (generalization of the Diffie-Hellman exponent assumption, GDDHE assumption), although GDDHE assumption introduced by Boneh and Boyen at Eurocrypt'05 [16] now has been accepted widely by researchers [17][18][19][20][21][22]. Aggregate Signature.…”

Section: Signaturementioning

confidence: 99%

A Short Server-Aided Certificateless Aggregate Multisignature Scheme in the Standard Model

Trinh

2019

Security and Communication Networks

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Aggregate signature scheme allows each signer to sign a different message and then all those signatures are aggregated into a single short signature. In contrast, multisignature scheme allows multisigners to jointly sign only one message. Aggregate multisignature scheme is a combination of both aforementioned signature schemes, where signers can choose to generate either a multisignature or an aggregate signature. This combination scheme has many concrete application scenarios such as Bitcoin blockchain, Healthcare, Multicast Acknowledgment Aggregation, and so on. On the other hand, to deal with the problems of expensive certificates in certified public key cryptography and key escrow in identity-based cryptography, the notion of certificateless public key cryptography has been introduced by Riyami and Paterson at Asiacrypt'03. In this paper, we propose the first certificateless aggregate multisignature scheme that achieves the constant-size of signature and is secure in the standard model under a generalization of the Diffie-Hellman exponent assumption. In our scheme, however, the signature is generated with the help of the authority.

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“…In [4], Li et al presented a personal health record (PHR) secure sharing scheme in cloud computing. Subsequently, various constructions of ABE schemes were presented in [9,[23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Traceable Ciphertext‐Policy Attribute‐Based Encryption with Verifiable Outsourced Decryption in eHealth Cloud

Zhu

Ying

et al. 2018

Wireless Communications and Mobile Computing

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In cloud-assisted electronic health care (eHealth) systems, a patient can enforce access control on his/her personal health information (PHI) in a cryptographic way by employing ciphertext-policy attribute-based encryption (CP-ABE) mechanism. There are two features worthy of consideration in real eHealth applications. On the one hand, although the outsourced decryption technique can significantly reduce the decryption cost of a physician, the correctness of the returned result should be guaranteed. On the other hand, the malicious physician who leaks the private key intentionally should be caught. Existing systems mostly aim to provide only one of the above properties. In this work, we present a verifiable and traceable CP-ABE scheme (VTCP-ABE) in eHealth cloud, which simultaneously supports the properties of verifiable outsourced decryption and white-box traceability without compromising the physician’s identity privacy. An authorized physician can obtain an ElGamal-type partial decrypted ciphertext (PDC) element of original ciphertext from the eHealth cloud decryption server (CDS) and then verify the correctness of returned PDC. Moreover, the illegal behaviour of malicious physician can be precisely (white-box) traced. We further exploit a delegation method to help the resource-limited physician authorize someone else to interact with the CDS. The formal security proof and extensive simulations illustrate that our VTCP-ABE scheme is secure, efficient, and practical.

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A Ciphertext-Policy Attribute-based Encryption Scheme With Optimized Ciphertext Size And Fast Decryption

Cited by 42 publications

References 25 publications

A Lightweight Fine-Grained Search Scheme over Encrypted Data in Cloud-Assisted Wireless Body Area Networks

A Lightweight Fine-Grained Search Scheme over Encrypted Data in Cloud-Assisted Wireless Body Area Networks

A Short Server-Aided Certificateless Aggregate Multisignature Scheme in the Standard Model

Traceable Ciphertext‐Policy Attribute‐Based Encryption with Verifiable Outsourced Decryption in eHealth Cloud

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