The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 2020
Filed:
Jan. 11, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
Kenichiro Hayasaka, Tokyo, JP;
Yutaka Kawai, Tokyo, JP;
Takato Hirano, Tokyo, JP;
Yoshihiro Koseki, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A management apparatus () stores encrypted tags (C(D)) and encrypted data such that they are associated with each other. When a search apparatus () obtains a search keyword (s) for searching for encrypted data stored in the management apparatus (), the search apparatus () calculates deterministic information (t) which is uniquely determined by the search keyword (s), and generates a search query (Q(s)) by performing encryption of a probabilistic encryption scheme on the search keyword (s) using the deterministic information (t). The search apparatus () transmits the search query (Q(s)) to the management apparatus (). When the management apparatus () receives the search query (Q(s)) from the search apparatus (), the management apparatus () determines whether the search keyword (s) obtained by decrypting the search query (Q(s)) matches an associated keyword obtained by decrypting an encrypted tag (c) stored in the management apparatus ().