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Authorized equality test on identity-based ciphertexts for secret data sharing via cloud storage

Journal Article


Download full-text (Open Access)

Abstract


  • With the higher rate of using cloud storage, protecting data privacy becomes an important issue. The most effective solution is to encrypt data before uploading to the cloud. However, how to efficiently search over data encrypted with different keys is still an open problem. To address this problem, we introduce a new notion of the identity-based encryption with equality test supporting flexible authorization (IBEET-FA). It supports the test of whether two ciphertexts encrypted under the different keys encapsulate the same message, and in the meanwhile supports fine-grained authorization of the test. Based on the equality test on ciphertexts, there is a direct way to support an authorized user to search over ciphertexts of different users, which accelerates secret data sharing among a group of users. Besides, IBEET-FA does not suffer from the complex key management problem of its counterpart in the traditional public key infrastructure. We propose a concrete construction of IBEET-FA and prove it to be securely based on simple mathematical assumptions. The experimental results show that our IBEET-FA scheme is efficient and can satisfy various types of search over encrypted data.

Authors


  •   Li, Hongbo (external author)
  •   Huang, Qiong (external author)
  •   Ma, Sha (external author)
  •   Shen, Jian (external author)
  •   Susilo, Willy

Publication Date


  • 2019

Citation


  • Li, H., Huang, Q., Ma, S., Shen, J. & Susilo, W. (2019). Authorized equality test on identity-based ciphertexts for secret data sharing via cloud storage. IEEE Access, 7 25409-25421.

Scopus Eid


  • 2-s2.0-85062685225

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=3475&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/2468

Number Of Pages


  • 12

Start Page


  • 25409

End Page


  • 25421

Volume


  • 7

Place Of Publication


  • United States

Abstract


  • With the higher rate of using cloud storage, protecting data privacy becomes an important issue. The most effective solution is to encrypt data before uploading to the cloud. However, how to efficiently search over data encrypted with different keys is still an open problem. To address this problem, we introduce a new notion of the identity-based encryption with equality test supporting flexible authorization (IBEET-FA). It supports the test of whether two ciphertexts encrypted under the different keys encapsulate the same message, and in the meanwhile supports fine-grained authorization of the test. Based on the equality test on ciphertexts, there is a direct way to support an authorized user to search over ciphertexts of different users, which accelerates secret data sharing among a group of users. Besides, IBEET-FA does not suffer from the complex key management problem of its counterpart in the traditional public key infrastructure. We propose a concrete construction of IBEET-FA and prove it to be securely based on simple mathematical assumptions. The experimental results show that our IBEET-FA scheme is efficient and can satisfy various types of search over encrypted data.

Authors


  •   Li, Hongbo (external author)
  •   Huang, Qiong (external author)
  •   Ma, Sha (external author)
  •   Shen, Jian (external author)
  •   Susilo, Willy

Publication Date


  • 2019

Citation


  • Li, H., Huang, Q., Ma, S., Shen, J. & Susilo, W. (2019). Authorized equality test on identity-based ciphertexts for secret data sharing via cloud storage. IEEE Access, 7 25409-25421.

Scopus Eid


  • 2-s2.0-85062685225

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=3475&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/2468

Number Of Pages


  • 12

Start Page


  • 25409

End Page


  • 25421

Volume


  • 7

Place Of Publication


  • United States