Key-Escrow Free Attribute-Based Multi-Keyword Search with Dynamic Policy Update in Cloud Computing

Varri, Uma Sankararao; Pasupuleti, Syam Kumar; Kadambari, K. V.

doi:10.1109/ccgrid49817.2020.00-48

Cited by 13 publications

(8 citation statements)

References 18 publications

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“…In the traditional ABE scheme, the key generation center (KGC) generates the decryption keys for the users, which means that the KGC has the ability to access and decrypt data. To overcome this issue, the schemes in [23,24] generate decryption keys for users by introducing multiple authorization centers, each of which can only calculate partial keys. The scheme in [25] used an unmanaged key issue protocol executed between the CSP and the KGC, but the computational cost is too high.…”

Section: Related Workmentioning

confidence: 99%

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Efficient Revocable Attribute-Based Encryption with Data Integrity and Key Escrow-Free

Huang,

Liu,

Yang

et al. 2024

Information

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Revocable attribute-based encryption (RABE) provides greater flexibility and fine-grained access control for data sharing. However, the revocation process for most RABE schemes today is performed by the cloud storage provider (CSP). Since the CSP is an honest and curious third party, there is no guarantee that the plaintext data corresponding to the new ciphertext after revocation is the same as the original plaintext data. In addition, most attribute-based encryption schemes suffer from issues related to key escrow. To overcome the aforementioned issues, we present an efficient RABE scheme that supports data integrity while also addressing the key escrow issue. We demonstrate the security for our system, which is reduced to the decisional q-parallel bilinear Diffie-Hellman exponent (q-PBDHE) assumption and discrete logarithm (DL) assumption. The performance analysis illustrates that our scheme is efficient.

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Section: Related Workmentioning

confidence: 99%

“…The functional analysis between our scheme and the schemes in [21,24,26] is shown in Table 2. None of the comparison schemes can simultaneously meet the three functional requirements listed in the table, that is, cannot simultaneously meet integrity, key escrow, and revocation.…”

Section: Functional Analysismentioning

confidence: 99%

Efficient Revocable Attribute-Based Encryption with Data Integrity and Key Escrow-Free

Huang,

Liu,

Yang

et al. 2024

Information

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“…The computation and communication cost are subject to the policy size. Recently, Varri et al [17] proposed a multi-keyword search over CP-ABE with dynamic policy update. This scheme uses the encryption information of the old policy to update the policy without choosing the new secret value.…”

Section: A Ciphertext Updatementioning

confidence: 99%

A Lightweight Policy Update Scheme for Outsourced Personal Health Records Sharing

Fugkeaw

2021

IEEE Access

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With high flexibility and accessibility of data outsourcing environment such as cloud computing environment, several healthcare providers implement electronic personal health records (PHRs) to enable individual patients to manage their own health data in such resilient and scalable environment. However, PHRs contain highly sensitive information of which the security and privacy issues are the critical concern. Besides, PHRs owners should be capable to flexibly and securely define their own access policy for their outsourced data. In addition to the basic authentication feature, existing commercial cloud platforms usually provide symmetric or public key encryption as an optional feature to support data confidentiality for their tenants. However, such traditional encryption schemes are not suitable for data outsourcing environment because of high key management overhead of symmetric encryption and high maintenance cost for handling multiple copies of ciphertext for public key encryption solution. In this paper, we design and develop a secure and fine-grained access control scheme with lightweight access policy update for outsourced PHRs. Our proposed scheme is based on the ciphertext policy attribute-based encryption (CP-ABE) and proxy reencryption (PRE). In addition, we introduce a policy versioning technique to support the full traceability of policy changes. Finally, we conducted the performance evaluation to demonstrate the efficiency of the proposed scheme.

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“…at is, fine-grained access control is needed for PHR. us, attribute-based keyword search has been implemented by many researchers [1][2][3][4][5][6][7][8][9][10][11][12]. In these schemes, data owners can encrypt their data with predefined access control policies.…”

Section: Introductionmentioning

confidence: 99%

“…However, there are some limitations in existing schemes. Firstly, in the schemes [7][8][9][10], each user's attributes are organized in a single set, which cannot support the compounded attributes. For example, consider a user who is a "Researcher" working in "College A" and serves as both "Director" of "Department of Medicine" and "Professor" of "Department of Chemistry," and the above attributes are both valid and are likely to be used to describe him.…”

Section: Introductionmentioning

confidence: 99%

Attribute Set-Based Boolean Keyword Search over Encrypted Personal Health Records

Lin

et al. 2021

Security and Communication Networks

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A personal health record (PHR) is an electronic application which enables patients to collect and share their health information. With the development of cloud computing, many PHR services have been outsourced to cloud servers. Cloud computing makes it easier for patients to manage their personal health records and makes it easier for doctors and researchers to share and access this information. However, due to the high sensitivity of PHR, a series of security protections are needed to protect them, such as encryption and access control. In this article, we propose an attribute set-based Boolean keyword search scheme, which can realize fine-grained access control and Boolean keyword search over encrypted PHR. Compared with the existing attribute-based searchable encryption, our solution can not only improve the flexibility in specifying access policies but also perform Boolean keyword search, which can meet the needs of large-scale PHR users. Furthermore, we simulate our scheme, and the experimental results show that our scheme is practical for PHR systems in cloud computing.

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Key-Escrow Free Attribute-Based Multi-Keyword Search with Dynamic Policy Update in Cloud Computing

Cited by 13 publications

References 18 publications

Efficient Revocable Attribute-Based Encryption with Data Integrity and Key Escrow-Free

Efficient Revocable Attribute-Based Encryption with Data Integrity and Key Escrow-Free

A Lightweight Policy Update Scheme for Outsourced Personal Health Records Sharing

Attribute Set-Based Boolean Keyword Search over Encrypted Personal Health Records

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