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Your search returned 205 patents.
( 380/200 in Current US Classification )
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Patent IDTitleDate Filed
6985586 Distributed information and storage system February 28, 2001
6985585 Cryptographic method for color images and digital cinema March 30, 2001
6985584 Non-volatile record medium, recording method, and recording apparatus March 27, 2000
6983049 Storage devices for secure scalable data streaming October 4, 2001
6978256 Method and apparatus for selling digital contents, processing program thereof and recording medium for the program September 17, 2002
6976166 Method and apparatus for partial encryption of content February 6, 2001
6970851 System and method of configuring value cards September 28, 2001
6968058 Digital evidential camera system for generating alteration detection data using built-in encryption key April 16, 1999
6961429 Method and device for guaranteeing the integrity and authenticity of a set of data January 16, 2001
6959290 Method and apparatus for tracking states of digital works March 31, 2003
6957329 System for encrypting data from multiple multimedia applications and method thereof February 5, 2001
6957193 Repository with security class and method for use thereof June 18, 2003
6956949 Method and apparatus for authenticating an hierarchy of video receiving devices September 29, 2000
6954738 Method and apparatus for distributing enforceable property rights December 1, 2003
6950520 Method and apparatus for carrying data in a video signal so that the data is not recorded January 25, 2000
6931534 Method and a device for encryption of images November 19, 1999
6925448 Usage rights grammar and digital works having usage rights created with the grammar July 14, 2003
6920221 Method and apparatus for protected exchange of status and secret values between a video source application and a video hardware interface March 31, 2000
6912513 Copy-protecting management using a user scrambling key October 29, 1999
6898285 System to deliver encrypted access control information to support interoperability between digital information processing/control equipment June 2, 2000
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