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Time-controlled proxy searchable re-encryption against collusion attacks.

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Title: Time-controlled proxy searchable re-encryption against collusion attacks.
Authors: Zhang, Hui1 (AUTHOR) zhanghui18@cdut.edu.cn, Fu, Junjun2 (AUTHOR), Liao, Xiaojuan1,3 (AUTHOR), Chen, Guangzhu1,3 (AUTHOR), Ma, Haichuan1,3 (AUTHOR), Zhou, Rang1 (AUTHOR)
Source: Computer Standards & Interfaces. Apr2026, Vol. 97, pN.PAG-N.PAG. 1p.
Subjects: Collusion, Data encryption, Electronic health records, Keyword searching, Access control, Cloud computing security measures
Abstract: Proxy Re-Encryption with Keyword Search (PREKS) enables the secure delegation of search authority over encrypted data, which is highly valuable in scenarios such as electronic health systems: patients (data owners) upload encrypted Electronic Health Data (EHD) and keywords to the cloud, granting initial search permissions to attending doctors (delegators); delegators can share these permissions with consulting doctors (delegatees) by re-encrypting keywords via a proxy server, without the need to consult data owners again. Existing PREKS schemes require a trusted proxy to avoid collusion risks between the proxy and delegatees, resulting in high communication overhead. To address this issue, this paper proposes a Time-controlled public key Proxy Searchable Re-Encryption scheme against Collusion Attacks (TcPSRE-CA), which innovatively integrates proxy functionality with cloud servers to reduce overhead. The scheme supports time-limited authorization and conjunctive keyword search, with its security proven under the random oracle model. Experimental results demonstrate that the proposed scheme effectively reduces communication and storage overhead while maintaining high computational efficiency. [Display omitted] • A time-controlled proxy searchable re-encryption scheme (TcPSRE-CA) is proposed. • TcPSRE-CA integrates proxy and cloud functionalities to reduce communication overhead. • TcPSRE-CA supports conjunctive keyword search while ensuring query privacy. • TcPSRE-CA effectively resists collusion between the proxy server and delegatee. • Formal security is proven under the standard random oracle model. [ABSTRACT FROM AUTHOR]
Copyright of Computer Standards & Interfaces is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 191980250
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Time-controlled proxy searchable re-encryption against collusion attacks.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Hui%22">Zhang, Hui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> zhanghui18@cdut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Fu%2C+Junjun%22">Fu, Junjun</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liao%2C+Xiaojuan%22">Liao, Xiaojuan</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Guangzhu%22">Chen, Guangzhu</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Haichuan%22">Ma, Haichuan</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Rang%22">Zhou, Rang</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Computer+Standards+%26+Interfaces%22">Computer Standards & Interfaces</searchLink>. Apr2026, Vol. 97, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Collusion%22">Collusion</searchLink><br /><searchLink fieldCode="DE" term="%22Data+encryption%22">Data encryption</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+health+records%22">Electronic health records</searchLink><br /><searchLink fieldCode="DE" term="%22Keyword+searching%22">Keyword searching</searchLink><br /><searchLink fieldCode="DE" term="%22Access+control%22">Access control</searchLink><br /><searchLink fieldCode="DE" term="%22Cloud+computing+security+measures%22">Cloud computing security measures</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Proxy Re-Encryption with Keyword Search (PREKS) enables the secure delegation of search authority over encrypted data, which is highly valuable in scenarios such as electronic health systems: patients (data owners) upload encrypted Electronic Health Data (EHD) and keywords to the cloud, granting initial search permissions to attending doctors (delegators); delegators can share these permissions with consulting doctors (delegatees) by re-encrypting keywords via a proxy server, without the need to consult data owners again. Existing PREKS schemes require a trusted proxy to avoid collusion risks between the proxy and delegatees, resulting in high communication overhead. To address this issue, this paper proposes a Time-controlled public key Proxy Searchable Re-Encryption scheme against Collusion Attacks (TcPSRE-CA), which innovatively integrates proxy functionality with cloud servers to reduce overhead. The scheme supports time-limited authorization and conjunctive keyword search, with its security proven under the random oracle model. Experimental results demonstrate that the proposed scheme effectively reduces communication and storage overhead while maintaining high computational efficiency. [Display omitted] • A time-controlled proxy searchable re-encryption scheme (TcPSRE-CA) is proposed. • TcPSRE-CA integrates proxy and cloud functionalities to reduce communication overhead. • TcPSRE-CA supports conjunctive keyword search while ensuring query privacy. • TcPSRE-CA effectively resists collusion between the proxy server and delegatee. • Formal security is proven under the standard random oracle model. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Computer Standards & Interfaces is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.csi.2026.104139
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      – Code: eng
        Text: English
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        PageCount: 1
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      – SubjectFull: Collusion
        Type: general
      – SubjectFull: Data encryption
        Type: general
      – SubjectFull: Electronic health records
        Type: general
      – SubjectFull: Keyword searching
        Type: general
      – SubjectFull: Access control
        Type: general
      – SubjectFull: Cloud computing security measures
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    Titles:
      – TitleFull: Time-controlled proxy searchable re-encryption against collusion attacks.
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            NameFull: Zhang, Hui
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            NameFull: Fu, Junjun
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            NameFull: Liao, Xiaojuan
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            NameFull: Chen, Guangzhu
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            NameFull: Ma, Haichuan
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            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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              Value: 97
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