Device for transferring digital information
Patent #: 4150404
Issued on: 04/17/1979
Inventor: Tercic , et al.
Disaster alert system
Patent #: 4155042
Issued on: 05/15/1979
Inventor: Permut , et al.
Pay per view television control device
Patent #: 4358672
Issued on: 11/09/1982
Inventor: Hyatt , et al.
Method of controlling scrambling and unscrambling in a pay TV system
Patent #: 4388643
Issued on: 06/14/1983
Inventor: Aminetzah
Cryptographic communications system and method
Patent #: 4405829
Issued on: 09/20/1983
Inventor: Rivest , et al.
Multi-layer encryption system for the broadcast of encrypted information
Patent #: 4531020
Issued on: 07/23/1985
Inventor: Wechselberger , et al.
Full-field teletext system with dynamic addressability
Patent #: 4600921
Issued on: 07/15/1986
Inventor: Thomas
Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals
Patent #: 4613901
Issued on: 09/23/1986
Inventor: Gilhousen , et al.
Software protection device
Patent #: 4634807
Issued on: 01/06/1987
Inventor: Chorley , et al.
Method and apparatus for retrieving remotely located information
Patent #: 4649533
Issued on: 03/10/1987
Inventor: Chorley , et al.
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Software distribution system
Patent #: 4658093
Issued on: 04/14/1987
Inventor: Hellman
Selective-subscription descrambling
Patent #: 4712238
Issued on: 12/08/1987
Inventor: Gilhousen , et al.
Security arrangement for downloadable cable television converters
Patent #: 4712239
Issued on: 12/08/1987
Inventor: Frezza , et al.
Encrypted broadcast television system
Patent #: 4736422
Issued on: 04/05/1988
Inventor: Mason
System for processing coded information
Patent #: 4823385
Issued on: 04/18/1989
Inventor: Hegendorfer
Reproduction of secure keys by using distributed key generation data
Patent #: 4864615
Issued on: 09/05/1989
Inventor: Bennett , et al.
Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system
Patent #: 4866770
Issued on: 09/12/1989
Inventor: Seth-Smith , et al.
Electronic transaction system
Patent #: 4885777
Issued on: 12/05/1989
Inventor: Takaragi, et al.
Cryptographic system for direct broadcast satellite system
Patent #: 4887296
Issued on: 12/12/1989
Inventor: Horne
RE33189
Management of cryptographic keys
Patent #: 4912762
Issued on: 03/27/1990
Inventor: Lee, et al.
Bootstrap channel security arrangement for communication network
Patent #: 4982430
Issued on: 01/01/1991
Inventor: Frezza, et al.
Unforgeable personal identification system
Patent #: 4993068
Issued on: 02/12/1991
Inventor: Piosenka, et al.
Functionally modifiable cable television converter system
Patent #: 5003591
Issued on: 03/26/1991
Inventor: Kauffman, et al.
Method for electronic transaction with digital signature
Patent #: 5018196
Issued on: 05/21/1991
Inventor: Takaragi, et al.
External security module for a television signal decoder
Patent #: 5029207
Issued on: 07/02/1991
Inventor: Gammie
Geographic black-out method for direct broadcast satellite system
Patent #: 5036537
Issued on: 07/30/1991
Inventor: Jeffers, et al.
Method for secure communication
Patent #: 5073935
Issued on: 12/17/1991
Inventor: Pastor
RE33808
Cryptographic key distribution method and system
Patent #: 5124117
Issued on: 06/23/1992
Inventor: Tatebayashi, et al.
Hybrid public key algorithm/data encryption algorithm key distribution method based on control vectors
Patent #: 5142578
Issued on: 08/25/1992
Inventor: Matyas, et al.
Control system for satellite delivered pay-per-view television system
Patent #: 5151782
Issued on: 09/29/1992
Inventor: Ferraro
Method and apparatus for providing demographically targeted television commercials
Patent #: 5155591
Issued on: 10/13/1992
Inventor: Wachob
Robust data broadcast over a distributed network with malicious failures
Patent #: 5175765
Issued on: 12/29/1992
Inventor: Perlman
Cable television system having dynamic market code shuffling
Patent #: 5231665
Issued on: 07/27/1993
Inventor: Auld, et al.
Satellite receiver retuning system
Patent #: 5235643
Issued on: 08/10/1993
Inventor: Anderson, et al.
Independent external security module for a digitally upgradeable television signal decoder
Patent #: 5237610
Issued on: 08/17/1993
Inventor: Gammie, et al.
Location-sensitive remote database access control
Patent #: 5243652
Issued on: 09/07/1993
Inventor: Teare, et al.
Authentication system
Patent #: 5249230
Issued on: 09/28/1993
Inventor: Mihm, Jr.
Receiver control circuit for a television for controlling programs to be supplied for viewing
Patent #: 5270822
Issued on: 12/14/1993
Inventor: Choi
Time limited signal conduction system
Patent #: 5282248
Issued on: 01/25/1994
Inventor: DeJoy
System for controlling access to broadcast transmissions
Patent #: 5282249
Issued on: 01/25/1994
Inventor: Cohen, et al.
Methods and apparatus for scrambling and unscrambling compressed data streams
Patent #: 5285497
Issued on: 02/08/1994
Inventor: Thatcher, Jr.
Process for the transmission and reception of personalized programs
Patent #: 5301233
Issued on: 04/05/1994
Inventor: Coutrot, et al.
Methods and apparatus for uniquely encrypting data at a plurality of data transmission sites for transmission to a reception site
Patent #: 5341425
Issued on: 08/23/1994
Inventor: Wasilewski, et al.
Hybrid encryption method and system for protecting reusable software components
Patent #: 5343527
Issued on: 08/30/1994
Inventor: Moore
Method of selecting cable television converter groups
Patent #: 5381477
Issued on: 01/10/1995
Inventor: Beyers, II, et al.
Method and apparatus for uniquely encrypting a plurality of services at a transmission site
Patent #: 5381481
Issued on: 01/10/1995
Inventor: Gammie, et al.
System and method for transmitting a plurality of digital services
Patent #: 5400401
Issued on: 03/21/1995
Inventor: Wasilewski, et al.
Process for improving public key authentication
Patent #: 5402490
Issued on: 03/28/1995
Inventor: Mihm, Jr.
CATV systems
Patent #: 5414773
Issued on: 05/09/1995
Inventor: Handelman
Methods for providing conditional access information to decoders in a packet-based multiplexed communications system
Patent #: 5420866
Issued on: 05/30/1995
Inventor: Wasilewski
System and method for simultaneously authorizing multiple virtual channels
Patent #: 5425101
Issued on: 06/13/1995
Inventor: Woo, et al.
Television receiver location identification
Patent #: 5432542
Issued on: 07/11/1995
Inventor: Thibadeau, et al.
Communication network access method and system
Patent #: 5440633
Issued on: 08/08/1995
Inventor: Augustine, et al.
Electronic document processing system and method of forming digital signature
Patent #: 5465299
Issued on: 11/07/1995
Inventor: Matsumoto, et al.
Roving software license for a hardware agent
Patent #: 5473692
Issued on: 12/05/1995
Inventor: Davis
Interactive information services control system
Patent #: 5481542
Issued on: 01/02/1996
Inventor: Logston, et al.
Computer network cryptographic key distribution system
Patent #: 5481613
Issued on: 01/02/1996
Inventor: Ford, et al.
System and method for disk software publishers to control disk distribution
Patent #: 5488410
Issued on: 01/30/1996
Inventor: Lieberfarb, et al.
Message protection mechanism and graphical user interface therefor
Patent #: 5497422
Issued on: 03/05/1996
Inventor: Tysen, et al.
Digital camera with apparatus for authentication of images produced from an image file
Patent #: 5499294
Issued on: 03/12/1996
Inventor: Friedman
Method and apparatus for feature authorization and software copy protection in RF communications devices
Patent #: 5499295
Issued on: 03/12/1996
Inventor: Cooper
System and method for transmitting and receiving variable length authorization control for digital services
Patent #: 5506904
Issued on: 04/09/1996
Inventor: Sheldrick, et al.
System and method for providing compressed digital teletext services and teletext support services
Patent #: 5519780
Issued on: 05/21/1996
Inventor: Woo, et al.
Communication network access method and system
Patent #: 5524052
Issued on: 06/04/1996
Inventor: Augustine, et al.
Security system for preventing unauthorized communications between networks by translating communications received in ip protocol to non-ip protocol to remove address and routing services information
Patent #: 5550984
Issued on: 08/27/1996
Inventor: Gelb
System and method for centralized session key distribution, privacy enhanced messaging and information distribution using a split private key public cryptosystem
Patent #: 5557678
Issued on: 09/17/1996
Inventor: Ganesan
System and method for data recovery
Patent #: 5557765
Issued on: 09/17/1996
Inventor: Lipner, et al.
System and methods for data encryption using public key cryptography
Patent #: 5559889
Issued on: 09/24/1996
Inventor: Easter, et al.
System and methods for data encryption using public key cryptography
Patent #: 5563950
Issued on: 10/08/1996
Inventor: Easter, et al.
Method of identifying set-top receivers
Patent #: 5565909
Issued on: 10/15/1996
Inventor: Thibadeau, et al.
Method for providing a roving software license from one node to another node
Patent #: 5568552
Issued on: 10/22/1996
Inventor: Davis
Method for improving the processing and storage performance of digital signature schemes
Patent #: 5568554
Issued on: 10/22/1996
Inventor: Eastlake, 3rd
Secure, swift cryptographic key exchange
Patent #: 5583939
Issued on: 12/10/1996
Inventor: Chang, et al.
Method and device for scrambling and descrambling of a specific television broadcast
Patent #: 5588058
Issued on: 12/24/1996
Inventor: Le Berre
Countdown system for conditional access module
Patent #: 5590202
Issued on: 12/31/1996
Inventor: Bestler, et al.
TV set top box using GPS
Patent #: 5621793
Issued on: 04/15/1997
Inventor: Bednarek, et al.
Method and apparatus for impulse purchasing of packaged information services
Patent #: 5671276
Issued on: 09/23/1997
Inventor: Eyer, et al.
Process for cryptographic key generation and safekeeping
Patent #: 5675649
Issued on: 10/07/1997
Inventor: Brennan, et al.
Crypt key system
Patent #: 5740246
Issued on: 04/14/1998
Inventor: Saito
Information terminal having reconfigurable memory
Patent #: 5742677
Issued on: 04/21/1998
Inventor: Pinder, et al.
Image authentication patterning
Patent #: 5764770
Issued on: 06/09/1998
Inventor: Schipper, et al.
Apparatus and method for establishing a cryptographic link between elements of a system
Patent #: 5787172
Issued on: 07/28/1998
Inventor: Arnold
Timed availability of secured content provisioned on a storage medium
Patent #: 5857020
Issued on: 01/05/1999
Inventor: Peterson, Jr.
Method and apparatus for using network address information to improve the performance of network transactions
Patent #: 5862220
Issued on: 01/19/1999
Inventor: Perlman
Method and apparatus for providing conditional access in connection-oriented, interactive networks with a multiplicity of service providers
Patent #: 5870474
Issued on: 02/09/1999
Inventor: Wasilewski, et al.
Analog/digital system for television services
Patent #: 5920626
Issued on: 07/06/1999
Inventor: Durden, et al.
Preventing replay attacks on digital information distributed by network service providers
Patent #: 6005938
Issued on: 12/21/1999
Inventor: Banker, et al.
Verification of the source of program information in a conditional access system
Patent #: 6105134
Issued on: 08/15/2000
Inventor: Pinder, et al.
Source authentication of download information in a conditional access system Patent #: 6246767
Issued on: 06/12/2001
Inventor: Akins, III , et al.
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