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:
Oct. 01, 2013
Filed:
Dec. 28, 2009
Shigeki Katayama, Kiyose, JP;
Katsuhiko Sekiguchi, Tama, JP;
Kazuto Fukushima, Aoba-ku, JP;
Tsutomu Matsumoto, Yokohama, JP;
Shigeki Katayama, Kiyose, JP;
Katsuhiko Sekiguchi, Tama, JP;
Kazuto Fukushima, Aoba-ku, JP;
Tsutomu Matsumoto, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Yokohama National University, Yokohama, JP;
Abstract
According to one embodiment, when sending a transmission target main data, an authentication-tag generator unitgenerates an authentication tagby using a main dataand a key datastored in a key-data storage unit. A transmitter/receiver unitadds the authentication tagto the main datasends as a transmission data. When receiving the received data, the transmitter/receiver unitdivides the received data into a main dataand an authentication tag. The authentication-tag generator unitgenerates an authentication tagfor comparison. A received-data authentication unitdetermines whether or not those the received authentication tagand the authentication tag for comparisonmatch with each other. A different key data is used every time upon the authentication-tag generation and use time of each key data during a set period is restricted.