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A new construction of public key authenticated encryption with keyword search based on LWE

Author

Listed:
  • Ziqing Wang

    (University of Electronic Science and Technology of China)

  • Jin Li

    (Henan Economic Management School)

  • Xiaoguang Liu

    (Southwest Minzu University)

  • Xinyan Wu

    (University of Electronic Science and Technology of China)

  • Fagen Li

    (University of Electronic Science and Technology of China)

Abstract

A public key encryption with keyword search (PEKS) scheme allows users to share encrypted data through cloud servers. However, an inside adversary may launch inside keyword guessing attack (IKGA) for a given trapdoor and guess the keyword. Public key authenticated encryption with keyword search (PAEKS) is a variant of PEKS scheme that can resist IKGA. Most PAEKS schemes cannot resist quantum attacks. To solve this problem, we propose two lattice-based PAEKS schemes under random oracle and standard model respectively. We also improve the security model of PAEKS and prove the security of our schemes under the improved model. The ciphertext and trapdoor sizes of our first scheme are about half of those of the existing lattice-based PAEKS scheme CM22, and the test phase computation overhead of our scheme is about 50.37% of CM22.

Suggested Citation

  • Ziqing Wang & Jin Li & Xiaoguang Liu & Xinyan Wu & Fagen Li, 2024. "A new construction of public key authenticated encryption with keyword search based on LWE," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 86(2), pages 229-240, June.
    • Handle: RePEc:spr:telsys:v:86:y:2024:i:2:d:10.1007_s11235-024-01131-8
    DOI: 10.1007/s11235-024-01131-8
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    Keywords

    PEKS; PAEKS; Lattice; Post-quantum; IKGA; LWE;
    All these keywords.

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