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Patent Searching and Data


Title:
検索実行装置、検索実行方法、検索実行プログラム及び秘匿検索システム
Document Type and Number:
Japanese Patent JP7350220
Kind Code:
B2
Abstract:
A search execution device receives a trapdoor generated based on a user secret key in which a search auxiliary key and an attribute of a user are set and a search keyword, together with a key identifier (ID) that identifies the search auxiliary key. The search execution device decrypts an encrypted tag in which an attribute of a user who is allowed retrieval and a search word are set, using the received trapdoor and the search auxiliary key indicated by the received key ID, so as to identify a tag that is retrievable for the attribute set in the user secret key and contains a search word corresponding to the search keyword.

Inventors:
Takashi Ito
Makoto Matsuda
Tadakazu Yamanaka
Takato Hirano
Yoshihiro Ozeki
Application Number:
JP2023532792A
Publication Date:
September 25, 2023
Filing Date:
July 27, 2021
Export Citation:
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Assignee:
Mitsubishi Electric Corporation
International Classes:
G09C1/00
Foreign References:
WO2011086687A1
WO2012095973A1
WO2013111284A1
CN110457915A
Other References:
福田 洋治 他,預託データの非集中化機能について,電子情報通信学会技術研究報告,日本,一般社団法人電子情報通信学会,2015年02月26日,Vol.114 No.500,pp.13-17,[ISSN ]0913-5685
江村 恵太 他,まぜるな危険準同型暗号,CSS2016 コンピュータセキュリティシンポジウム2016 論文集 情報処理学会シンポジウムシリーズ,日本,一般社団法人情報処理学会,2016年10月04日, Vol.2016 No.2,pp.60-67
Attorney, Agent or Firm:
Patent Attorney Corporation Cross Border Patent Office