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- W2892013782 abstract "Searchable symmetric encryption (SSE) which can search encrypted data using encrypted keywords has been extremely studied. In Asiacrypt’10, Chase and Kamara formalized structured encryption which is a generalization of SSE, and its concrete schemes were proposed. An efficient SSE scheme (hereafter, Chase-Kamara scheme) which has a very simple encrypted index is obtained by simplifying the concrete schemes, and its adaptive security can be proved, easily. In the Chase-Kamara scheme, a search result for a keyword is represented as a bit string in which the i-th bit is 1 when the i-th document contains the keyword, and the encrypted index is built by directly masking the search result with each bit of the output of a pseudo-random function. Therefore, the Chase-Kamara scheme requires pseudo-random functions whose output lengths are longer than the number of documents that users would like to store. As a result, the trapdoor size of the Chase-Kamara scheme depends on the number of stored documents. In this paper, we propose a modified scheme whose trapdoor size does not depend on the number of stored documents. The modified scheme is constructed by using our multiple hashing technique which can transform a trapdoor of short length to that of long length without any secret information. We also show that the modified scheme achieves the same adaptive security as the Chase-Kamara scheme in the random oracle model." @default.
- W2892013782 created "2018-09-27" @default.
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- W2892013782 date "2018-01-01" @default.
- W2892013782 modified "2023-09-28" @default.
- W2892013782 title "Efficient Trapdoor Generation from Multiple Hashing in Searchable Symmetric Encryption" @default.
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- W2892013782 doi "https://doi.org/10.1007/978-3-319-99807-7_10" @default.
- W2892013782 hasPublicationYear "2018" @default.
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