| 6304659 |
Secure data broadcasting |
| Oct-16-2001 |
In a method of receiving packets of data addressed to one or more receivers each having an individual identifier, wherein the data is included in a digital signal having destination addresses successively... |
| 5666412 |
Secure access systems and methods utilizing two access cards |
| Sep-9-1997 |
A CATV system including a CATV network and apparatus for transmitting over the CATV network information to a multiplicity of subscriber units, each including a CATV decoder and an IC card reader and writer... |
| 5117458 |
Secret information service system and method |
| May-26-1992 |
An information service system including a plurality of receiving stations and information service facilities. The information service facilities include a memory circuit which stores beforehand a distribution... |
| 6148082 |
Scrambling and descrambling control word control in a remultiplexer for video bearing transport streams |
| Nov-14-2000 |
A method and system are provided for remultiplexing program bearing data. The remultiplexing method and system are applicable to MPEG-2 compliant transport streams carrying video programs. A descriptor... |
| 5621799 |
Scrambled transmission system |
| Apr-15-1997 |
A scrambled transmission system for transmitting a digital data containing variable length coding conforming to a MPEG standard includes a scramble key generator for generating a scramble key at a timing... |
| 5642418 |
Satellite television system and method |
| Jun-24-1997 |
A system for controlling the acquisition of encrypted program signals such as television or other signals utilizing existing equipment in use in telecommunications networks. The transmitted program signals... |
| 6980655 |
Rolling code security system |
| Dec-27-2005 |
A rolling code transmitter is useful in a security system for providing secure encrypted RF transmission comprising an interleaved trinary bit fixed code and rolling code. A receiver demodulates the encrypted... |
| 6690796 |
Rolling code security system |
| Feb-10-2004 |
A rolling code transmitter is useful in a security system for providing secure encrypted RF transmission comprising an interleaved trinary bit fixed code and rolling code. A receiver demodulates the encrypted... |
| 6785817 |
Reprogrammable subscriber terminal |
| Aug-31-2004 |
A reprogrammable subscriber terminal of a subscription television service which can have the control program code of its control processor modified by downloading new program code from the headend. The... |
| 6564324 |
Reprogrammable subscriber terminal |
| May-13-2003 |
A reprogrammable subscriber terminal of a subscription television service which can have the control program code of its control processor modified by downloading new program code from the headend. The... |
| 4864615 |
Reproduction of secure keys by using distributed key generation data |
| Sep-5-1989 |
A key security system provides for the reproduction of secure keys by using distributed key generation data and a distributed encrypted prekey. The system encrypts program key generation data with a program... |
| 6937729 |
Representing entitlements to service in a conditional access system |
| Aug-30-2005 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 6292568 |
Representing entitlements to service in a conditional access system |
| Sep-18-2001 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 6591420 |
Remote control system for audio and video content |
| Jul-8-2003 |
A program distribution system is disclosed for the simultaneous release of a program at a plurality of locations. The locations may include local broadcasters, or even individual devices. A program is... |
| 6925567 |
Remote control of VCR with electronic mail |
| Aug-2-2005 |
A security apparatus and a security method for controlling electric devices by use of electronic mails. A modem receives an electronic mail sent from a sending side and stores the received electronic mail... |
| 6910133 |
Reflected interrupt for hardware-based encryption |
| Jun-21-2005 |
A router may induce a reflected interrupt to indicate to a processor in the router to execute encryption or decryption commands on packets in an input queue. The reflected interrupt may have a lower priority... |
| 6714650 |
Recording of scrambled digital data |
| Mar-30-2004 |
A system for transmitting and recording digital data is included. Further, a system for transmitting transmit scrambled audio data that is to be recorded on a mini disc reader is included. A system for... |
| 5046090 |
Recorded medium for video control system |
| Sep-3-1991 |
A video recording medium storing a video program includes a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program... |
| 5963645 |
Reception apparatus, reception method, transmission apparatus, transmission method, transmission-reception apparatus, and transmission-reception method |
| Oct-5-1999 |
A reception apparatus for receiving a broadcast signal which is transmitted from a transmitting side and which includes personalized information comprising data representing information about specific... |
| 5606611 |
Receiving station management apparatus |
| Feb-25-1997 |
In a transmitting unit, receiving stations are formed into a plurality of groups, and information associated with the right to receive a broadcasting service is rewritten in units of groups by converting... |
| 6674858 |
Receiving device, recording and reproducing device and receiving/recording-reproducing system for digital broadcast signal |
| Jan-6-2004 |
A receiving device comprises a signal demodulator circuit for demodulating an encrypted video signal and attribute information including information for decoding an encryption, an attribute information... |
| 5144662 |
Public communication system comprising distributed stations, and station and sub-station for use in such a communication system |
| Sep-1-1992 |
A public communication system for encrypted audio/video information has various selective entitlement organizations with respect to its distributed receiver station. Such receiver station comprises one... |
| 4980912 |
Public communication system comprising distributed stations, and station and sub-station for use in such a communication system |
| Dec-25-1990 |
A public communication system for encrypted audio/video information has various selective entitlement organizations with respect to its distributed receiver station. Such receiver station comprises one... |
| 6477547 |
Processing system comprised of data processing device and data access device each converting data and mutually communicating the converted data |
| Nov-5-2002 |
There is provided a processing system capable of preventing third parties from improper operation. Referring to FIG. 4, a storage device generates a pseudo random number (key data k), calculates a value... |
| 5301233 |
Process for the transmission and reception of personalized programs |
| Apr-5-1994 |
A process for the transmission and reception of personalized programs. The program is constituted by personalized program elements containing an identification of the recipient or addressee, the access... |
| 5615265 |
Process for the transmission and reception of conditional access programs controlled by the same operator |
| Mar-25-1997 |
Process for the transmission and reception of conditional access programs controlled by the same operator. According to the invention, specific check words (MCSi) are formed for various programs of the... |
| 6005938 |
Preventing replay attacks on digital information distributed by network service providers |
| Dec-21-1999 |
A technique for preventing replay attacks on digital information distributed by network service providers. At the beginning of a subscription period for a service, a network service provider sends entitlement... |
| 5134656 |
Pre-payment television system using a memory card associated with a decoder |
| Jul-28-1992 |
According to the invention, on the emitter side, a number generator (10) delivers a random code (XAL) which is sent to the input of a master card (11) which ciphers such code according to a predetermined... |
| 7020284 |
Perceptual encryption and decryption of movies |
| Mar-28-2006 |
The present invention is a combined encoder and perceptual encrypter for a file of high quality video. The combined encoder and perceptual encrypter includes an encoder and perceptual encrypter. The encoder... |
| 6834110 |
Multi-tier digital TV programming for content distribution |
| Dec-21-2004 |
A method of securely providing data to a user's system over a broadcast infrastructure. The method comprising the steps of: encrypting the data using a first encrypting key; encrypting a first decrypting... |
| 6834110 |
Multi-tier digital TV programming for content distribution |
| Dec-21-2004 |
A method of securely providing data to a user's system over a broadcast infrastructure. The method comprising the steps of: encrypting the data using a first encrypting key; encrypting a first decrypting... |
| 4531020 |
Multi-layer encryption system for the broadcast of encrypted information |
| Jul-23-1985 |
A method of controlling the simultaneous broadcast of enciphered digital information signals, for example in a radio or television broadcast environment, to a plurality of subscribers provides several... |
| 6314188 |
Motion picture data encrypting method and computer system and motion picture data encoding/decoding apparatus to which encrypting method is applied |
| Nov-6-2001 |
Of I, P, and B pictures contained in an MPEG 2 data stream, only the I picture is subjected to encryption such as scramble processing. Scramble rule data used at that time is stored in the lead-in area... |
| 4914694 |
Modifying a television signal to inhibit recording/reproduction |
| Apr-3-1990 |
A composite television signal is modified to inhibit the reproduction of an unauthorized recording thereof by conventional video recorders but enable the display of a video picture therefrom on a television... |
| 5285497 |
Methods and apparatus for scrambling and unscrambling compressed data streams |
| Feb-8-1994 |
Methods and apparatus for encoding compressed data streams efficiently, and methods and apparatus for decoding the encrypted data streams efficiently and inexpensively, are disclosed. In an encoder 10',... |
| 5224161 |
Method of scrambling and of unscrambling composite video signals, and device for implementation |
| Jun-29-1993 |
In order to scramble as effectively as possible pay-television transmissions, the transmitter is made to transmit, at one and the same time, access messages and entitlement messages, all of them crypted... |
| 5144663 |
Method of interactive communication between a subscriber and a decoder of a system of pay-television and decoder thereof |
| Sep-1-1992 |
A decoder comprising a microprocessor connected to a receiver of data of teletext and to a text generator for displaying information on the screen of a television receiver. Further, a CPTV-card (card pay-television)... |
| 4388643 |
Method of controlling scrambling and unscrambling in a pay TV system |
| Jun-14-1983 |
Scrambling of a video signal in a pay TV system is effected in dependence upon a first variable which is changed recurrently, e.g. monthly, and a second variable which changes from field to field. For... |
| 5590194 |
Method of and apparatus for scrambling a video signal with full network transmission and recording capability |
| Dec-31-1996 |
A video scrambling and descrambling system that produces color video that is difficult or annoying to watch by randomly switching the color components of a component or composite video. In the scrambling... |
| 6944299 |
Method for synchronous encryption over a communication medium |
| Sep-13-2005 |
An apparatus and method provide for synchronized operation of encryption processes at two remote communication terminals. A first one of the terminals detects information associated with a current time... |
| 6975725 |
Method for standardizing the use of ISO 7816 smart cards in conditional access systems |
| Dec-13-2005 |
A conditional access system and method are disclosed allowing the use of a standard smart card. A computing resource configured to run the conditional access protocol has a smart card interface and a software... |
| 5761307 |
Method for securing data in a telecommunications system |
| Jun-2-1998 |
A subscriber network is operated bidirectionally and has one or more coaxial line tree networks which are shared in each case by a plurality of subscriber-end network termination units and extend between... |
| 6683955 |
Method for receiving a secured transmission of information through a plurality of frequency orthogonal subchannels |
| Jan-27-2004 |
One embodiment of the present invention is a method for receiving a secured transmission of information in an ADSL environment using a DMT modulation technique. The order of the frequency orthogonal subchannels... |
| 5764771 |
Method for processing a digital signal in a so-called secure communication system and use of this method for access control and/or binary signature |
| Jun-9-1998 |
The present invention relates to a method of processing a digital signal of dimension k, in a so-called secure communication system, such that the digital signal (y) at output cannot be deduced from the... |
| 6167136 |
Method for preventing copying of digital video disks |
| Dec-26-2000 |
A method for securely storing analog or digital data on a data storage medium. An analog information signal is combined with a noise signal. The composite noise and information signal is encrypted with... |
| 5581614 |
Method for encrypting and embedding information in a video program |
| Dec-3-1996 |
Apparatus and methods are provided for encrypting and decrypting information having a header portion and a body portion. The decrypting method includes the steps of reading a current month from a clock,... |
| 6937730 |
Method and system for providing content-specific conditional access to digital content |
| Aug-30-2005 |
Content level filtering or masking of digital content that is broadcast, multicast, or otherwise distributed to receivers in a communications system. Instead of controlling the content only at the location... |
| 6038316 |
Method and system for protection of digital information |
| Mar-14-2000 |
An information processing system including an encryption processing logic module and a decryption processing logic module for enabling the encryption of digital information to be decrypted with a decryption... |
| 6961558 |
Method and receiver for receiving a radio broadcast signal having encoded contents |
| Nov-1-2005 |
A receiver for a radio broadcast signal, in particular a car radio, and a method for receiving a radio broadcast signal, including a signal decoder for decoding an audio signal contained in the radio broadcast... |
| 5832083 |
Method and device for utilizing data content |
| Nov-3-1998 |
The present invention provides a data content utilizing device having data storing section for storing information obtained by encoding data contents and content identification information specifying the... |
