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:
Aug. 18, 2015
Filed:
Jan. 13, 2011
Nori Matsuda, Tokyo, JP;
Takashi Ito, Tokyo, JP;
Mitsuhiro Hattori, Tokyo, JP;
Takumi Mori, Tokyo, JP;
Takato Hirano, Tokyo, JP;
Nori Matsuda, Tokyo, JP;
Takashi Ito, Tokyo, JP;
Mitsuhiro Hattori, Tokyo, JP;
Takumi Mori, Tokyo, JP;
Takato Hirano, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An access terminal apparatus provides a group determination key being a decryption key to a data center apparatus previously, and then transmits grouping information generated from a keyword of storage target data and having been encrypted to the data center apparatus, with encrypted data of the storage target data and tag data of the encrypted data of the storage target data. The data center apparatus stores the encrypted data relating it to the tag data, decrypts a part of the grouping information with the group determination key, derives an index value from a bit value obtained by the decryption, and stores the derived index value and the tag data relating them with each other.