ボリューム漏洩が低減された、暗号化されたデータに対する暗号化されたサーチ

Japanese Patent JP7271800

B2

A method for performing encrypted search includes receiving a search query for a plurality of keywords from a user device that appear in one or more encrypted documents stored on an untrusted storage device. The method also includes accessing an encrypted search index to obtain a first list of document identifiers each representative of a document that includes a first keyword and a second keyword of the plurality of keywords. The method also includes, for each remaining keyword, determining a corresponding list of document identifiers each representative of a document that includes the first, second, and respective remaining keyword. The method includes determining, based on the first list of document identifiers and each corresponding list of document identifiers, a second list of document identifiers each representative of a document that includes each of the plurality of keywords. The method also includes returning the second list to the user device.

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JP6957482	Methods and systems for secure transfer of entities on a blockchain basis
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Yeo, Kevin
Theo, Jun Yang
Persiano, Giuseppe
Patel, Sarvar

JP2022567370A

May 11, 2023

December 16, 2020

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Google LLC

G09C1/00

US20100138399

M. A. Manazir AHSAN et al.,Countering Statistical Attacks in Cloud-Based Searchable Encryption,International Journal of Parallel Programming,2018年06月30日,Vol. 48,No. 3,26 pages,DOI: 10.1007/S10766-018-0584-8

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