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. 26, 2002
Filed:
Apr. 01, 1999
International Business Machines Corporation, Armonk, NY (US);
Abstract
In providing a system that can manage access to data to effectively prevent illegal access to the data or the like, there is provided a system for embedding access management information that prepares management information for managing access to the data, and embeds the management information in the data through data transformation without changing amount of data. In managing access to data, there is provided a method that extracts management information embedded in the data through data deformation without changing amount of data, and manages access to the data according to the extracted management information. There is also provided a method for changing management of access to the data according to the type of medium in which the data is stored (RAM or ROM). The management information further contains information for controlling recording of the data, reception of the data, playback of the data, interference of output of the data, duplication history of the data, or modification of the management information. The access management method can prevent illegal duplication of data or the like, and can effectively protect a work.