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. 09, 2010
Filed:
Jan. 30, 2004
Yasuyuki Higashiura, Inagi, JP;
Takumi Kishino, Inagi, JP;
Keizo Sato, Inagi, JP;
Shoki Kadowaki, Inagi, JP;
Seigo Kotani, Kawasaki, JP;
Yasuyuki Higashiura, Inagi, JP;
Takumi Kishino, Inagi, JP;
Keizo Sato, Inagi, JP;
Shoki Kadowaki, Inagi, JP;
Seigo Kotani, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Fujitsu Frontech Limited, Tokyo, JP;
Abstract
An electronic data storage system stores electronic data with attaching an electronic signature, and output the electronic data along with the attached electronic signature, which decreases the operation costs with a simple operation. By using a public key-based signature, a third party can verify the data, and by using a secret check code, the electronic signature at registration is always valid without risk of falsification. Also by attaching an electronic signature at access, the validity of the stored data is assured, and a third party can verify the data. By using all of these features, the verification by a third party becomes possible over the long term. In this way the long term storage of electronic data is implemented.