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- W2954471701 abstract "Public key encryption with equality test (PKEET) allows testing whether two ciphertexts are generated by the same message or not. PKEET is a potential candidate for many practical applications like efficient data management on encrypted databases. Potential applicability of PKEET leads to intensive research from its first instantiation by Yang et al. (CT-RSA 2010). Most of the followup constructions are secure in the random oracle model. Moreover, the security of all the concrete constructions is based on number-theoretic hardness assumptions which are vulnerable in the post-quantum era. Recently, Lee et al. (ePrint 2016) proposed a generic construction of PKEET schemes in the standard model and hence it is possible to yield the first instantiation of PKEET schemes based on lattices. Their method is to use a 2-level hierarchical identity-based encryption (HIBE) scheme together with a one-time signature scheme. In this paper, we propose, for the first time, a direct construction of a PKEET scheme based on the hardness assumption of lattices in the standard model. More specifically, the security of the proposed scheme is reduces to the hardness of the Learning With Errors problem. We have used the idea of the full identity-based encryption scheme by Agrawal et al. (EUROCRYPT 2010) to construct the proposed PKEET." @default.
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- W2954471701 date "2019-01-01" @default.
- W2954471701 modified "2023-10-12" @default.
- W2954471701 title "A Lattice-Based Public Key Encryption with Equality Test in Standard Model" @default.
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- W2954471701 doi "https://doi.org/10.1007/978-3-030-21548-4_8" @default.
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