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. 01, 2015
Filed:
Nov. 12, 2012
Katsuyuki Takashima, Tokyo, JP;
Tatsuaki Okamoto, Tokyo, JP;
Katsuyuki Takashima, Tokyo, JP;
Tatsuaki Okamoto, Tokyo, JP;
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Chiyoda-ku, JP;
Abstract
A cryptographic processing system and method to decrease the sizes of public parameters and a master secret key, and shorten the time taken for the generation process of the secret key to be supplied to the user and the encryption process. A generation device generates a basis B and a basis B* that form public parameters and a master secret key using a sparse matrix in which each row and each column have at least one value other than 0. An encryption device generates a vector in the basis B, the vector being embedded with predetermined information, as a cipher vector. A decryption device, by treating a predetermined vector in the basis B* as a key vector, conducts a pairing operation for the cipher vector and the key vector, to decrypt the cipher vector.