A Provably Secure Ciphertext-Policy Hierarchical Attribute-Based Encryption

Wang, Ziying; Wang, Jian

doi:10.1007/978-3-319-27051-7_4

Cited by 5 publications

(8 citation statements)

References 15 publications

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“…e first algorithm is an attribute encryption algorithm that is based on ciphertext policy ABE (CP-ABE), which embeds access strategy into ciphertext, while the user's private key binds a set of attributes to represent the user's identity [6,7]. Wang et al [8] adopted the method [9] and extended most attribute encryption schemes based on a bilinear pairing operation to outsourced attribute encryption schemes. Lai et al [10] considered the security verification of outsourcing decryption based on [9] and proposed an ABE scheme that supports verifiable outsourcing decryption and proves the security of the scheme with the standard model; however, the efficiency of the scheme is low.…”

Section: Related Workmentioning

confidence: 99%

“…To evaluate the computational efficiency of the scheme proposed in this paper, the computational overhead in the stages of private key generation, encryption, and decryption is theoretically analysed. e computational efficiency of this scheme is compared with that of the ABE scheme in [8,[13][14][15]18]. In the process of the comparison, |U| represents the number of all attributes in the system, |S| denotes the number of attributes of DU, s represents a set of attributes that satisfies the decryption requirements, and l represents the number of rows in matrix M in LSSS.…”

Section: 1mentioning

confidence: 99%

“…Table 1 shows the efficiency comparison of each scheme. Wang et al [8] used offline or online technology in the encryption phase. To facilitate the comparison, other outsourcing technologies are compared.…”

Section: 1mentioning

confidence: 99%

“…e disadvantage is that [14] only supports the "AND" gate access strategy and has limited expressive ability. Wang et al [8] support offline/online encryption and decryption outsourcing but the scheme does not support validation of the correctness of outsourcing decryption, and AA requires a large number of exponential operations. Kai et al [13] support encryption and decryption outsourcing and verify the correctness of the calculation results but their AA requires numerous exponential operations.…”

Section: 1mentioning

confidence: 99%

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User Privacy Protection Scheme Based on Verifiable Outsourcing Attribute-Based Encryption

Luo

2021

Security and Communication Networks

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Given the rapid development of cloud computing and cloud storage technology, a growing number of enterprises and individuals use cloud storage services to save data or back up data. In the cloud storage services, although attribute-based encryption can protect users’ data security, the computational cost of key generation, data encryption, and data decryption linearly increases with the complexity of access strategies, which becomes more critical for resource-constrained users. Therefore, this paper proposes a verifiable attribute-based encryption scheme for a fully outsourced ciphertext policy. The scheme can simultaneously realize the functions of key generation, data encryption, and data decryption outsourcing and verify the correctness of the outsourcing calculation results. This scheme can effectively reduce the computational burden of a cloud storage system. The security and verifiability of the scheme are indicated and proved with the random oracle model. The experimental results show that the scheme has the advantages of function and efficiency compared with other schemes. The research results have theoretical and practical significance.

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Section: Related Workmentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

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User Privacy Protection Scheme Based on Verifiable Outsourcing Attribute-Based Encryption

Luo

2021

Security and Communication Networks

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“…Green et al [15] provided an ABE scheme in which partial decryption operations are outsourced to the CS. Wang et al [24] proposed an adaptive security outsourcing CP-ABE scheme. But, they only considered the requirements of decryption outsourcing.…”

Section: ) Attribute-based Encryption (Abe)mentioning

confidence: 99%

Verifiable and Multi-Keyword Searchable Attribute-Based Encryption Scheme for Cloud Storage

2019

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In attribute-based searchable encryption (ABSE) scheme, data owners can encrypt their data with access policy for security consideration, and encrypt keywords to obtain keyword index for privacy keyword search, and data users can search interesting keyword on keyword indexes by keyword search trapdoor. However, many existing searchable encryption schemes only support single keyword search and most of the existing attribute-based encryption (ABE) schemes have high computational costs at user client. These problems significantly limit the application of attribute-based searchable encryption schemes in practice. In this paper, we propose a verifiable and multi-keyword searchable attribute-based encryption (VMKS-ABE) scheme for cloud storage, in our new scheme, multi-keyword can be searched and the search privacy is protected. That is, the cloud server can search the multi-keyword with keyword search trapdoor but it does not know any information about the keywords searched. In the proposed scheme, many computing tasks are outsourced to the cloud proxy server, which greatly reduces the computing burden at the user client. Besides, the scheme also supports the verification of the correctness of the outsourced private key. The proposed scheme is proved secure that the keyword index is indistinguishable under the adaptive keyword attacks in the general group model, and the ciphertext is selective secure under selective plaintext attacks in the random oracle model. The security and experimental results show that our scheme is suitable for practicability. INDEX TERMS Attribute-based encryption, verifiable outsourcing, multi-keyword search, adaptive security.

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A trusted medical data sharing framework for edge computing leveraging blockchain and outsourced computation

Quan,

Yao,

Chen

et al. 2023

Heliyon

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A Provably Secure Ciphertext-Policy Hierarchical Attribute-Based Encryption

Cited by 5 publications

References 15 publications

User Privacy Protection Scheme Based on Verifiable Outsourcing Attribute-Based Encryption

User Privacy Protection Scheme Based on Verifiable Outsourcing Attribute-Based Encryption

Verifiable and Multi-Keyword Searchable Attribute-Based Encryption Scheme for Cloud Storage

A trusted medical data sharing framework for edge computing leveraging blockchain and outsourced computation

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