US Patent No: 5,504,816

Number of patents in Portfolio can not be more than 2000

Method and apparatus for controlling access to digital signals

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Abstract

A method and apparatus are provided for controlling access to digital signals sent via a first communication path and retransmitted over a second communication path. The digital signals, having been encrypted by a first encryption scheme and sent over the first communication path, are received and decrypted. The decrypted signals are then retransmitted over the second communication path using a second encryption scheme that differs from the first encryption scheme.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GENERAL INSTRUMENT CORPORATIONHORSHAM, PA1041

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hamilton, Jeffrey S Doylestown, PA 15 494
Kauffman, Marc Ft. Washington, PA 3 461
Vince, Lawrence D Lansdale, PA 26 249

Cited Art

Patent Info (Count) # Cites Year
 
GENERAL INSTRUMENT CORPORATION (4)
5,144,664 Apparatus and method for upgrading terminals to maintain a secure communication network 133 1990
5,138,659 Conversion of television signal formats with retention of common control data stream 116 1991
5,173,775 Reformatting of television signal data for transmission using a different modulation scheme 16 1991
5,173,900 Method and apparatus for communicating different categories of data in a single data stream 82 1991
 
BIOMETRIC 2000, INC., A DELAWARE CORPORATION (1)
5,153,918 Security system for data communications 92 1990
 
GENERAL ELECTRIC COMPANY (1)
4,817,146 Cryptographic digital signal transceiver method and apparatus 59 1984
 
HI/FN, INC. (1)
4,701,745 Data compression system 142 1986
 
HITACHI, LTD. (1)
5,235,641 File encryption method and file cryptographic system 127 1991
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
5,230,019 Key signal conversion device for CATV system 12 1991
 
NEXT LEVEL SYSTEMS, INC. (NLS-1) (1)
4,613,901 Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals 235 1983
 
PIONEER ELECTRONIC CORPORATION (1)
5,301,245 System for transmitting a commercial program in a CATV system 49 1992
 
SCIENTIFIC-ATLANTA, INC. (1)
5,341,425 Methods and apparatus for uniquely encrypting data at a plurality of data transmission sites for transmission to a reception site 182 1992
 
TIME WARNER ENTERTAINMENT COMPANY, L.P. (1)
4,222,068 Subscription television apparatus and methods 108 1978

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CONTENTGUARD HOLDINGS, INC. (36)
7,222,104 Method and apparatus for transferring usage rights and digital work having transferrable usage rights 12 2001
7,743,259 System and method for digital rights management using a standard rendering engine 1 2002
7,853,531 Method and apparatus for supporting multiple trust zones in a digital rights management system 0 2002
7,774,279 Rights offering and granting 1 2002
8,275,716 Method and system for subscription digital rights management 0 2002
8,099,364 Digital rights management of content when content is a future live event 1 2002
7,974,923 Extensible rights expression processing system 0 2002
7,558,759 Systems and methods for creating, manipulating and processing rights and contract expressions using tokenized templates 3 2002
8,108,313 Rights expression profile system and method using templates 1 2003
7,970,709 Method and apparatus for client customization by executing software parts on plural servers 1 2003
8,225,414 Method and apparatus for identifying installed software and regulating access to content 0 2003
7,913,095 Method and apparatus for providing a specific user interface in a system for managing content 0 2003
7,603,319 Method and apparatus for preserving customer identity in on-line transactions 1 2003
7,412,605 Method and apparatus for variable encryption of data 4 2003
8,069,116 System and method for supplying and managing usage rights associated with an item repository 1 2003
7,685,642 System and method for controlling rights expressions by stakeholders of an item 1 2003
7,840,488 System and method for granting access to an item or permission to use an item based on configurable conditions 2 2003
7,805,371 Rights expression profile system and method 0 2004
8,001,053 System and method for rights offering and granting using shared state variables 0 2004
7,774,280 System and method for managing transfer of rights using shared state variables 1 2004
7,725,401 Method and apparatus for establishing usage rights for digital content to be created in the future 1 2005
7,765,403 System for controlling the distribution and use of rendered digital works through watermarking 1 2005
7,809,644 Digital work structure 0 2005
7,609,848 Multi-stage watermarking process and system 1 2005
7,664,708 System for controlling the distribution and use of digital works using digital tickets 2 2005
7,720,767 Method and system to support dynamic rights and resources sharing 7 2005
7,523,072 System for controlling the distribution and use of digital works 14 2005
8,244,579 Method and apparatus for distributing enforceable property rights 0 2006
7,788,182 Method for loaning digital works 0 2006
8,271,350 Method and system for automatically publishing content 2007
8,275,709 Digital rights management of content when content is a future live event 0 2008
8,205,089 System for controlling the distribution and use of rendered digital works through watermarking 0 2009
7,907,749 Multi-stage watermarking process and system 0 2009
8,170,955 System and method for enforcing usage rights associated with digital content 0 2009
8,412,644 Method and apparatus for establishing usage rights for digital content to be created in the future 0 2010
8,078,542 System and method for managing transfer of rights using shared state variables 1 2010
 
INTARSIA SOFTWARE LLC (17)
6,128,605 Apparatus for data copyright management system 32 1997
7,447,914 Method for controlling database copyrights 4 1997
6,408,390 Apparatus for data copyright management system 62 1999
7,093,295 Method and device for protecting digital data by double re-encryption 100 1999
7,036,019 Method for controlling database copyrights 20 2000
6,789,197 Apparatus for data copyright management system 24 2000
7,730,324 Method for controlling database copyrights 3 2001
6,741,991 Data management system 36 2001
7,827,109 Digital content management system and apparatus 4 2001
6,721,887 Data copyright management system 17 2002
8,352,373 Data copyright management system 0 2003
7,383,447 Method for controlling database copyrights 3 2005
RE42163 Data management system 1 2006
7,801,817 Digital content management system and apparatus 3 2006
7,986,785 Data management 0 2006
7,979,354 Controlling database copyrights 0 2006
RE43599 Data management system 0 2007
 
LG ELECTRONICS INC. (8)
RE42950 Copy prevention method and apparatus for digital video system 1 2003
RE42921 Copy prevention method and apparatus for digital video system 1 2004
RE42951 Copy prevention method and apparatus for digital video system 1 2004
RE42922 Copy prevention method and apparatus for digital video system 1 2005
RE44068 Method and apparatus for descrambling digital video data and digital audio data using control data 0 2007
RE43993 Method and apparatus for scrambling and/or descrambling digital video data and digital audio data using control data 0 2007
RE44121 Copy prevention method and apparatus of a digital recording/reproducing system 0 2009
RE44106 Copy prevention method and apparatus of a digital recording/reproducing system 0 2009
 
THE DIRECTV GROUP, INC. (5)
7,590,243 Digital media conditional access system for handling digital media content 0 2005
8,095,466 Methods and apparatus to conditionally authorize content delivery at content servers in pay delivery systems 1 2006
8,001,565 Methods and apparatus to conditionally authorize content delivery at receivers in pay delivery systems 1 2006
7,992,175 Methods and apparatus to provide content on demand in content broadcast systems 0 2006
7,480,381 Super encrypted storage and retrieval of media programs in a hard-paired receiver and storage device 1 2007
 
INTARSIA LLC (4)
7,302,415 Data copyright management system 9 2000
RE41657 Data management system 6 2002
8,024,810 Method and apparatus for protecting digital data by double re-encryption 1 2006
7,730,323 Controlling database copyrights 7 2006
 
SONY CORPORATION (4)
6,560,221 Communication path control device, communication path control method, and communication path control unit 16 1999
7,392,389 Electronic transmission device, and signal transmission method 12 2002
8,064,596 Stream control device, stream encryption/decryption device, and stream encryption/decryption method 0 2006
7,987,515 Electronic transmission device, and signal transmission method 0 2008
 
COMCAST IP HOLDINGS I, LLC (3)
6,681,326 Secure distribution of video on-demand 93 2001
7,930,724 Secure distribution of video on-demand 0 2003
8,370,883 Secure distribution of video on-demand 0 2011
 
HUGHES ELECTRONICS CORPORATION (3)
5,970,386 Transmodulated broadcast delivery system for use in multiple dwelling units 63 1997
6,104,908 System for and method of combining signals of combining signals of diverse modulation formats for distribution in multiple dwelling units 30 1997
6,493,873 Transmodulator with dynamically selectable channels 29 1998
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (3)
7,151,832 Dynamic encryption and decryption of a stream of data 29 1999
6,963,972 Method and apparatus for networked information dissemination through secure transcoding 30 2000
7,088,823 System and method for secure distribution and evaluation of compressed digital information 9 2002
 
ARRIS ENTERPRISES, INC. (2)
7,463,737 System and method for conditional access key encryption 8 2001
8,117,638 System and method for improved multi-stream multimedia transmission and processing 0 2006
 
NXP B.V. (2)
5,659,618 Multi-size cryptographic key system 16 1995
7,848,303 Satellite multi-choice switch system 2 2004
 
RICOH COMPANY, LTD. (2)
5,675,645 Method and apparatus for securing executable programs against copying 55 1995
RE40405 Method and apparatus for securing executable programs against copying 3 1999
 
CANON KABUSHIKI KAISHA (1)
7,177,841 Digital contents distribution system, digital contents distribution method, roaming server, information processor, and information processing method 5 2001
 
ELECTRONICS FOR IMAGING, INC. (1)
6,647,149 Methods and apparatus for securely transmitting and processing digital image data 4 2001
 
ENTROPIC COMMUNICATIONS, INC. (1)
7,564,892 Satellite transcoder 3 2003
 
ENTRUST TECHNOLOGIES LIMITED (1)
5,949,883 Encryption system for mixed-trust environments 7 1995
 
GENERAL INSTRUMENT CORPORATION (1)
5,627,892 Data security scheme for point-to-point communication sessions 38 1995
 
INTELLECTUAL VENTURES II LLC (1)
6,430,199 Method and system for distributing telephone and broadband services over the copper pairs within a service location 71 1998
 
INTERON CORPORATION (1)
7,386,129 System and method for multimedia content simulcast 7 2001
 
IRDETO ACCESS B.V. (1)
7,296,162 Time validation system 1 2002
 
KONINKLIJKE PHILIPS ELECTRONICS N.V. (1)
6,493,389 Method and device for modifying data in an encoded data stream 6 2000
 
NAGRAVISION S.A. (1)
7,487,364 Method to store encrypted data 0 2002
 
SAMSUNG ELECTRONICS CO., LTD. (1)
5,996,103 Apparatus and method for correcting errors in a communication system 22 1996
 
SMS PROPERTY GROUP, LLC (1)
7,690,022 Video distribution system for digital and analog subscribers 1 2003
 
U.S. PHILIPS CORPORATION (1)
6,181,743 Method and device for modifying data in an encoded data stream 15 1999
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (3)
8,407,782 Data copyright management 0 2002
8,448,254 Digital content management system and apparatus 0 2010
8,442,916 Digital rights management of content when content is a future live event 0 2012