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:
Jun. 21, 2005
Filed:
Nov. 29, 2000
Hideki Imai, Yokohama-shi, Kanagawa 224-0801, JP;
Goichiro Hanaoka, Tokyo, JP;
Junji Shikata, Tokyo, JP;
Yuliang Zheng, Melbourne, AU;
Hideki Imai, Yokohama-shi, Kanagawa 224-0801, JP;
Goichiro Hanaoka, Tokyo, JP;
Junji Shikata, Tokyo, JP;
Yuliang Zheng, Melbourne, AU;
Other;
Abstract
A digital signature system comprises a center computer and a first and second terminal devices which can communicate with each other. The center computer generates and outputs a signing-key for a signer and a verification-key for a verifier. The first terminal device accepts the signing-key, generates a digital signature for a digital data to be signed using the signing-key, and outputs the digital signature. The second terminal device accepts the verification-key, the signer's identification code (e.g. the unique code of the signer), an identification code of the digital data and the digital signature, and verifies the validity of the digital signature using the verification-key, the identification code of the digital data and the signer's identification code.