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:
Feb. 06, 2001
Filed:
Mar. 26, 1998
Hiroyuki Ando, Kawasaki, JP;
Ichir{overscore (o)}u M{overscore (o)}rita, Kawasaki, JP;
Yasutsugu Kuroda, Kawasaki, JP;
Naoya Torii, Kawasaki, JP;
Masashi Yamazaki, Tokyo, JP;
Hiroshi Miyauchi, Tokyo, JP;
Kazue Sako, Tokyo, JP;
Seiichi Domyo, Fujisawa, JP;
Hiroyoshi Tsuchiya, Yokohama, JP;
Seiko Kanno, Yokohama, JP;
Other;
Abstract
A key recovery information distribution device is provided between a recoverer device and a key recovery device, recovers a data key for the recoverer device, and reduces the load of the recoverer device. Data is encrypted using the data key and stored with key recovery information. The recoverer device which decrypts the encrypted data distributes the key recovery information to key recovery devices through the key recovery information distribution device to recover key information. A recoverer is authenticated directly between the key recovery device and the recoverer device, and then the key information is transmitted to the recoverer device, and the recoverer device recovers the data key.