| 5799081 |
Illegal view/copy protection method and apparatus for digital broadcasting system |
| Aug-25-1998 |
An illegal view/copy protection method for a digital broadcasting system is disclosed including an audio/video signal transmission step for multiplexing and transmitting audio/video bit stream scrambled... |
| 5757909 |
Illegal view and copy protection method in digital video system and controlling method thereof |
| May-26-1998 |
Illegal view and copy protection method in a digital video system for preventing an illegal user from viewing the digital video system and copying therefrom, by setting a descrambling method which decrypts... |
| 4908834 |
High security pay television system |
| Mar-13-1990 |
A high security pay television system is provided in which television receivers include a decoder and with periodically changed removable memory modules. The decoder only functions to properly descramble... |
| 5029207 |
External security module for a television signal decoder |
| Jul-2-1991 |
A decoder for descrambling encoded satellite transmissions comprises an internal security element and a replaceable security module. The program signal is scrambled with a key and then the key itself is... |
| 5303295 |
Enhanced versatility of a program control by a combination of technologies |
| Apr-12-1994 |
A program control system for controlling access to premium programming and/or premium channels comprises a program control apparatus which may incorporate one or more subscriber modules. The subscriber... |
| 4736422 |
Encrypted broadcast television system |
| Apr-5-1988 |
A conditional access system for transmitting and receiving scrambled television signals over-air includes means for addressing each of the receiving apparatus with an over-air signal whereby to permit... |
| 5218638 |
Encipher method and decipher method |
| Jun-8-1993 |
A method and apparatus for carrying out limited encipherment broadcast by generating a cipher key obtained from destination information added to service information are provided. An information service... |
| 6681015 |
Digital recording/reproducing system |
| Jan-20-2004 |
A digital recording/reproducing system includes a set top box. The STB receives a digital television broadcast signal and transmits a scrambled data stream from a stream selector via an interface to a... |
| 6640305 |
Digital content protection method and apparatus |
| Oct-28-2003 |
Before use, a population of tamper-resistant cryptographic enforcement devices is partitioned into groups and issued one or more group keys. Each tamper-resistant device contains multiple computational... |
| 5774548 |
Digital broadcast transmitting and receiving system and transmitting and receiving apparatus thereof |
| Jun-30-1998 |
An arrangement to automatically change between a scrambled digital data output and descrambled digital data output of a receiver by inserting a control signal conforming to a program provider's policy... |
| 6690797 |
Descrambling device for the use of several conditional access sub-systems |
| Feb-10-2004 |
The descrambling device comprises hardware resources (1) and first memory zones (CA1, CA2, . . . , CAn) to store at least two different access control codes for controlling the hardware resources. The... |
| 5978479 |
Descrambler |
| Nov-2-1999 |
A descramble section extracts required information for descrambling transmitted together with TV signals and converts scrambled signals to ordinary TV signals in response to input control signals. A microcomputer... |
| 5790666 |
Decryptor |
| Aug-4-1998 |
A decryptor includes a descrambler for descrambling the scrambled signals using a PN signal, a PN generator which shifts the state successively from its initial state setup by a scramble-key, generates... |
| 6016348 |
Decoding system and data format for processing and storing encrypted broadcast, cable or satellite video data |
| Jan-18-2000 |
A decoder conditional access system incorporates different encryption systems for providing access to programs derived from different sources. A conditional access processor for processing encrypted program... |
| 6741991 |
Data management system |
| May-25-2004 |
To prevent piracy or leakage of data content, a cryptography technique and electronic watermark technique are combined together and used. In a data content supplied to a user, a user data is entered as... |
| 4989244 |
Data encripting transfer |
| Jan-29-1991 |
A data encripting transfer system includes a scanner for scanning an object to output an image signal, a data encripting device for encripting the image signal, and a data decoder for decoding the encripted... |
| 6934847 |
Data alteration checking apparatus and method and recording medium |
| Aug-23-2005 |
MAC values formed with respect to each file belonging to a directory 122A and ICVs (D-ICVc) formed on the basis of the MAC values of all files belonging to the directory 122A are stored into... |
| 6347144 |
Copy prevention method and apparatus for digital video system |
| Feb-12-2002 |
A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream: (b) decrypting... |
| 6832319 |
Content guard system for copy protection of recordable media |
| Dec-14-2004 |
A system and method for enabling broadcast programs to be copied once only by consumer recorders includes writing a unique media identification on each blank disk to which content is to copied in a read-only... |
| 6035038 |
Conditional access system and smartcard allowing such access |
| Mar-7-2000 |
The conditional access system of the present invention allows a service provider to supply services, which may be scrambled by a control word, only to those users who have acquired entitlements to these... |
| 5796829 |
Conditional access system |
| Aug-18-1998 |
An access control processor for a conditional access system in which encrypted information segments provided by a plurality of information service providers are encrypted for transmission in accordance... |
| 6069647 |
Conditional access and content security method |
| May-30-2000 |
A system featuring an interface unit connected to a programmable unit is described. The interface unit is capable of containing a time-sensitive key. The programmable unit is allowed to receive digital... |
| 6018581 |
Communication system and communication method |
| Jan-25-2000 |
A communication system can maintain high security in communication between a communication apparatus and a terminal. The communication system includes the communication apparatus and the terminal provided... |
| 4025948 |
Coding system for pay television apparatus |
| May-24-1977 |
At the sending end, a plurality of high-frequency oscillators each furnish a signal having a frequency different from the frequency of the other of the oscillators. Timing signals derived from the television... |
| 7039191 |
Chaining key broadcasting reception system and chaining key broadcasting reception method |
| May-2-2006 |
In the chaining key broadcasting reception system, a chaining key reception unit receives a chaining key, an identifier of the key in question and a target key identifier indicative of a chaining key to... |
| 5426701 |
Cable television converter box with a smart card connector underneath |
| Jun-20-1995 |
A Cable Television (CATV) Converter box or computer has a Smart Card connector mounted in a bottom wall thereof. The Converter box includes a case having a top wall, the bottom wall, and four side walls,... |
| 6650752 |
Broadcast reception device and contract management device using common master key in conditional access broadcast system |
| Nov-18-2003 |
A conditional access broadcast system for realizing conditional access while maintaining the safety level is disclosed. A contract management device at a broadcast station side delivers a reception contract... |
| 6904406 |
Audio playback/recording apparatus having multiple decoders in ROM |
| Jun-7-2005 |
An audio playback/recording apparatus includes an audio input processing section which receives analog audio data, and converts the analog audio data to digital audio data; a playback/recording processing... |
| 5509076 |
Apparatus for securing the integrity of a functioning system |
| Apr-16-1996 |
Apparatus is provided for securing the integrity of a functioning system. The apparatus comprises a primary device for performing a function having a first vulnerability and a secondary device having a... |
| 5144664 |
Apparatus and method for upgrading terminals to maintain a secure communication network |
| Sep-1-1992 |
A secure communication network serves a plurality of terminals grouped into different security categories. Each terminal includes a replaceable security element containing a security algorithm specific... |
| 6910020 |
Apparatus and method for granting access to network-based services based upon existing bank account information |
| Jun-21-2005 |
A network transaction system applicable to cyberspace banking services using an open network, which allows customers to authenticate themselves through a simplified procedure. A customer's terminal station... |
