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:
May. 05, 2009
Filed:
Jan. 12, 2001
Osamu Shibata, Moriguchi, JP;
Taihei Yugawa, Nara, JP;
Tsutomu Sekibe, Hirakata, JP;
Teruto Hirota, Moriguchi, JP;
Yoshiyuki Saito, Katano, JP;
Toshihiko Otake, Hyogo, JP;
Osamu Shibata, Moriguchi, JP;
Taihei Yugawa, Nara, JP;
Tsutomu Sekibe, Hirakata, JP;
Teruto Hirota, Moriguchi, JP;
Yoshiyuki Saito, Katano, JP;
Toshihiko Otake, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An authentication communication system includes an storage medium having an area for storing digital information and an access device for reading/writing digital information from/into the area. The access device authenticates whether the storage medium is authorized according to a challenge-response authentication protocol in which scrambled access information generated by scrambling the access information which shows the area is used. The storage medium authenticates whether the access device is authorized. When the access device and the storage medium have authenticated each other as authorized devices, the access device reads/writes digital information from/into the area in the storage medium according to the access information separated from the scrambled access information by the access device.