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:
Nov. 26, 2002
Filed:
Feb. 08, 1999
Kenichiro Kigo, Nakai-machi, JP;
Kohji Suzuki, Nakai-machi, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
In carrying out various authentication with use of a proof support information, it is intended to impose a limitation on utilization and make high-speed processing possible. Proof data generation control information is provided to a proof data generation device from a proof data generation control information generating device or from a proof data verification device. At the time of authentication, authentication data is provided from the proof data verification device to the proof data generation device, in which a proof data generation unit generates proof data on the basis of the authentication data, user unique identifying information, proof data generation control information, and proof support information (access ticket). However, in the event utilization does not meet conditions included in the proof data generation control information, generation of the proof data is rejected. The proof data is sent to the proof data verification device and is verified thereby. As authentication characteristic information there is used a decryption key in an asymmetric cryptosysytem which utilizes a discrete logarithm problem on a finite group G.