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Outsourced ciphertext-policy attribute-based encryption with equality test

Journal Article


Abstract


  • In the cloud era people get used to store their data to the cloud server, and would use encryption technique to protect their sensitive data from leakage. However, encrypted data management is a challenging problem, for example, encrypted data classification. Besides, how to effectively control the access to the encrypted data is also an important problem. Ciphertext-policy attribute-based encryption with equality test (CP-ABEET) is an efficient solution to the aforementioned problems, which enjoys the advantage of attribute-based encryption, and in the meanwhile supports the test of whether two different ciphertexts contain the same message without the need of decryption. However, the existing CP-ABEET schemes suffer from high computation costs. In this paper, we study how to outsource the heavy computation in CP-ABEET scheme to a third-party server. We introduce the notion of CP-ABEET supporting outsourced decryption (OCP-ABEET), which saves a lot of local computation loads of CP-ABEET. We propose a concrete construction of OCP-ABEET, and prove its security based on a reasonable number-theoretic assumption in the random oracle model. Compared with the existing CP-ABEET schemes, our scheme is more computationally efficient.

Authors


  •   Cui, Yuzhao (external author)
  •   Huang, Qiong (external author)
  •   Huang, Jianye (external author)
  •   Li, Hongbo (external author)
  •   Yang, Guomin

Publication Date


  • 2019

Citation


  • Cui, Y., Huang, Q., Huang, J., Li, H. & Yang, G. (2019). Outsourced ciphertext-policy attribute-based encryption with equality test. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 11449 448-467.

Scopus Eid


  • 2-s2.0-85064108027

Number Of Pages


  • 19

Start Page


  • 448

End Page


  • 467

Volume


  • 11449

Place Of Publication


  • Germany

Abstract


  • In the cloud era people get used to store their data to the cloud server, and would use encryption technique to protect their sensitive data from leakage. However, encrypted data management is a challenging problem, for example, encrypted data classification. Besides, how to effectively control the access to the encrypted data is also an important problem. Ciphertext-policy attribute-based encryption with equality test (CP-ABEET) is an efficient solution to the aforementioned problems, which enjoys the advantage of attribute-based encryption, and in the meanwhile supports the test of whether two different ciphertexts contain the same message without the need of decryption. However, the existing CP-ABEET schemes suffer from high computation costs. In this paper, we study how to outsource the heavy computation in CP-ABEET scheme to a third-party server. We introduce the notion of CP-ABEET supporting outsourced decryption (OCP-ABEET), which saves a lot of local computation loads of CP-ABEET. We propose a concrete construction of OCP-ABEET, and prove its security based on a reasonable number-theoretic assumption in the random oracle model. Compared with the existing CP-ABEET schemes, our scheme is more computationally efficient.

Authors


  •   Cui, Yuzhao (external author)
  •   Huang, Qiong (external author)
  •   Huang, Jianye (external author)
  •   Li, Hongbo (external author)
  •   Yang, Guomin

Publication Date


  • 2019

Citation


  • Cui, Y., Huang, Q., Huang, J., Li, H. & Yang, G. (2019). Outsourced ciphertext-policy attribute-based encryption with equality test. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 11449 448-467.

Scopus Eid


  • 2-s2.0-85064108027

Number Of Pages


  • 19

Start Page


  • 448

End Page


  • 467

Volume


  • 11449

Place Of Publication


  • Germany