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. 04, 2003
Filed:
Feb. 04, 1999
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An apparatus and method for user authentication for easily realizing the allocation of a complexity of rights when controlling access by a plurality of users to a plurality of objects. A verification apparatus sends to a proving apparatus required security information that shows the authority property required for access to an object, along with a challenge data and a modulo of a public key. A required security information inspection unit within the proving apparatus obtains the required security information stored in a response data memory and a control information representing a user's authority property stored in a control information memory. It then inspects whether an identifier of:the required security information is included in a list included in the control information. If the identifier is included, a response data is generated, upon! condition that all of challenge data, required security information, access ticket, control information and user identifying information are correct. An access ticket is a result of masking a user's capability, a data representing the extent of his access rights.