GB2295947A - Pay broadcasting system - Google Patents

Pay broadcasting system Download PDF

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Publication number
GB2295947A
GB2295947A GB9526342A GB9526342A GB2295947A GB 2295947 A GB2295947 A GB 2295947A GB 9526342 A GB9526342 A GB 9526342A GB 9526342 A GB9526342 A GB 9526342A GB 2295947 A GB2295947 A GB 2295947A
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United Kingdom
Prior art keywords
program
broadcasting
data communication
pay
permit code
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9526342A
Other versions
GB9526342D0 (en
GB2295947B (en
Inventor
Shunichi Momiki
Makoto Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Corp
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Mitsubishi Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP4289074A external-priority patent/JPH06141004A/en
Application filed by Mitsubishi Corp filed Critical Mitsubishi Corp
Priority to GB9621915A priority Critical patent/GB2305832B/en
Publication of GB9526342D0 publication Critical patent/GB9526342D0/en
Publication of GB2295947A publication Critical patent/GB2295947A/en
Application granted granted Critical
Publication of GB2295947B publication Critical patent/GB2295947B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47211—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting pay-per-view content
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
    • G06Q20/342—Cards defining paid or billed services or quantities
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F17/00—Coin-freed apparatus for hiring articles; Coin-freed facilities or services
    • G07F17/0014—Coin-freed apparatus for hiring articles; Coin-freed facilities or services for vending, access and use of specific services not covered anywhere else in G07F17/00
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/02—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by keys or other credit registering devices
    • G07F7/025—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by keys or other credit registering devices by means, e.g. cards, providing billing information at the time of purchase, e.g. identification of seller or purchaser, quantity of goods delivered or to be delivered
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/254—Management at additional data server, e.g. shopping server, rights management server
    • H04N21/2543—Billing, e.g. for subscription services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6187—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via a telephone network, e.g. POTS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/165—Centralised control of user terminal ; Registering at central
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17318—Direct or substantially direct transmission and handling of requests
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17345—Control of the passage of the selected programme
    • H04N7/17354—Control of the passage of the selected programme in an intermediate station common to a plurality of user terminals

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Business, Economics & Management (AREA)
  • Human Computer Interaction (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Accounting & Taxation (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Theoretical Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

A pay broadcasting system has a broadcasting station and a charging center so that the broadcasting station is arranged to transmit an open program number together with a broadcasting program scrambled by a scramble pattern changed for each program. The charging center transmits a broadcasting program distribution permit code for distributing a pay program in response to a request for distribution executed through a communication line by specifying the open program number and also collects a fee for the pay program. A receiving device descrambles the received pay program according to the broadcasting program distribution permit code. The program broadcast may be TV, teletext or data communication. The program accompanying the program may be non-opened in which case the request may be made by specifying a temporary program number. The scramble pattern instead of being changed for each program may be selected from a plurality of scramble patterns. <IMAGE>

Description

SPECIFICATION TITLE OF THE INVENTION PAY BROADCASTING SYSTEM BACKGROUND OF THE INVENTION The present invention relates to a system, in which broadcasting program is offered on pay basis in satellite television broadcasting, cable television broadcasting, or in terrestrial television broadcasting service via broadcasting satellite (BS) or communication satellite (CS).
In the informati~on-öriented society of today, satellite television broadcasting via broadcasting satellite (BS) or communication satellite (CS) as vell as cable television broadcasting called CATV (cable television) using coaxial cable or optical fiber cable are increasingly propagated.
Also, multiplex teletext broadcasting for separately transmitting character information via television wave is also being propagated.
@@ @@@@ of these satellite television broadcasting systems, unlike conventional type terrestrial television broadcasting, to which anybody is entitled to have access, a scrambled television program is transmitted so that only the subscribed viewers who signed the vieving contract can view the program and the subscribed viewers receive the program on pay basis using tuner/decoder, which can descramble the program.
In order to view the program on such pay satellite television broadcasting, it is necessary to use specialpurpose tuner/decoder. The tuner/decoder is provided with ID code, which is transmitted regularly (e.g. once monthly) from satellite, and only the tuner/decoder receiving the transmitted ID code can descramble the program.
The procedure to select and transmit ID for a viewer, who signed a viewing contract, is very troublesome, and ID code is not transmitted unless the contract is signed in advance. Even when the viever wants to view a pay-per-view program, there is no method of contracting for pay-perprogram on occasion, and thus, the viewer cannot view the program upon request.
Because the tuner/decoder is provided with ID, which corresponds to each transmitting station, as many tuner/ decoders as the number of transmitting stations are needed to view programs of many pay satellite television stations.
In CATV, which can transmit several tens of channels at the same time, special channels for broadcasting motion pictures, sports programs, music programs, etc. are broadcast in addition to general channels, which are not scrambled and can be viewed by comprehensive contract. The programs of such special television channels are transmitted as scrambled pay television channels. To view the programs in the scrambled channels, it is necessary to sign a contract for descrambling. Because the contract period is normally renewed by about one month, it is not possible to view the programs by contract signed at any desired time.
In order to have access to live sports program, motion picture program or music program to be broadcast through the scrambled satellite television broadcasting or CATV channels, there is a special system, in which a viewing time recorder is installed on each television set, and the fee is to be paid by deferred payment based on the actually vieved programs. Hovever, much labor is required for the control and fee collection for such system.
When a television viever receives programs from terrestrial or satellite television broadcasting and secondarily distributes them to a number of display devices, general television viewers may have to pay for some of the programs due to copyright even though the programs are offered free of charge from the original broadcasting station.
In this way, if the viewer wants to distribute the program form terrestrial or satellite television broadcasting on pay pay basis, there is no means to contract for individual programs same as in the cases of viewing satellite television broadcsting or CATV programs, and each viewer must sign subscription contract for each channel for the distribution.
To solve the above problems, the present inventors have filed Japanese Patent Application No. 4-199942, which discloses a charging system, whereby a charging center sends a viewing permit code for viewing a pay program to a data communication device in response to a request for vieving the pay program and a request for distribution of a broadcasting program, which are executed from a pay-per-program viewer via public telephone line by a data communication device, and the charging center also collects a fee for such program, and a receiving device displays a pay program according to the viewing permit code when it accepts the viewing permit code.
In the following, description will be given on the above invention.
Fig. 1 shorts a television charging system of the present invention. The television charging system comprises a satellite television broadcasting system 1, a CATV system 2, a multiplex teletext broadcasting system 3 using terrestrial television broadcasting, and a charging system 4.
In the satellite television broadcasting system 1 using BS or CS, reference numeral 11 represents a terrestrial station of satell~ite~television broadcasting, and television wave including a program code and a scrambled television signal is transmitted from a satellite communication transmitting antenna 12 to a geostationary satellite 13 on a geostationary orbit about 30,000 km above the equator.
When the television wave from satellite communication transmitting antenna 12 is received, the geostationary satellite 13 amplifies the received television wave, converts it to the frequency in the order of 10 GHz, and transmits it to the ground.
The viever receives the television wave of 10 GHz from the geostationary satellite 13 by a satellite television broadcasting receiving antenna 14. and the wave is converted to the frequency in the order of 1 GHz and is sent to a satellite television broadcasting receiving tuner/decoder 15. The satellite broadcasting receiving tuner/decoder 15 picks up video signal and audio signal from the television wave, sends them directly as video and audio signals to a television set or converts them again to the frequency receivable by the television set.
This satellite broadcasting system itself is the same as a conventional system, while, in this satellite television broadcasting, the program is scrambled, and only the viewers having the viewing permit code for descrambling the program can vies the television program.
In CATV system 2, reference numeral 21 represents a CATV broadcasting center, 22 a coaxial cable or an optical fiber cable for transmitting TV signal, and 23 is a CATV adapter/decoder. CATV adapter/decoder 23 picks up video signal and audio signal from CATV signal, descrambles them by decode signal. Further, the signals are sent directly as video and audio signals to the television set or by converting them to the frequency receivable by the television set.
In the multiplex teletext broadcasting system 3, reference numeral 31 is a terrestrial multiplex teletext broadcasting station for transmitting television signal with multiplex teletext on television wave program as terrestrial television wave from a television transmitting antenna 32. The transmitted terrestrial television wave is received by a television rave receiving antenna 33, and multiplex teletext signal is picked up from the television signal by a multiplex teletext adapter 34, and the signal is distributed to display devices 35, 35, 35 ..... such as video monitor, LED (light emitting diode) display device, LCD (liquid crystal device) display unit, display-phone, personal computer display unit, etc.
On the other hand, the charging system 4 comprises a charging center 41, a public telephone line 42 and a data communication device 43.
In this charging system 4, the pay-per-viewer requests for viewing to the charging center 41 through the public telephone line 42 by the data communication device 43 such as display-phone.
Upon receipt of the request from the pay-per-viever,'a viewing permit code for vieving a pay program is sent from the charging center 41 to the data communication device 43.
The viewing permit code sent to the data communication device 43 is sent to a satellite broadcasting tuner/decoder 15, a CATV adapter/decoder 23 or a multiplex teletext adapter 34 by on-line via a parallel data line, serial data line of RS-232C standard or ordinary public telephone line using modem, or by off-line via semiconductor memory unit such as IC card, memory card, etc. or magnetic memory unit such as magnetic card, magnetic disk, etc.
Upon receipt of the viewing permit code, the satellite broadcasting tuner/decoder 15, CATV adapter/decoder 23 or multiplex teletext adapter 34 descrambles the program, to which an identifying information corresponding to the viever permit code had been given, and television signal is sent to a television set 16 or 24 or teletext signal is sent to display devices 35, 35, 35 .... Thus, the vievable picture is displayed on the television set 16 or 24, and character signal is displayed on the display devices 35, 35, 35 On the other hand, the information of a fee for each pay program and the viewing permit code for each pay program are sent in advancefrom the satellite broadcasting terrestrial station 11, the CATV center 21 or the terrestrial wave broadcasting station 31 to the charging center 41.The charging center 41 collects the fee from the vievers, who request for viewing, on behalf of the satellite broadcasting terrestrial station 11,the CATV center 21 or the terrestrial wave broadcasting station 31.
The charging center and the communication device are connected by public telephone line, and account is settled via the public telephone line.
As the charging system, various methods can be utilized such as a method to use fee collecting system included in the public telephone line system, a method to use home banking system by banks, a method to use mail sales system in credit system, or VAN system.
In order that only the viewers who paid the fee can view the broadcasting program and the others cannot view it, the broadcasting program is scrambled. Various methods have been proposed for the scrambling, and typical methods include line permutation system and line rotation system for video signal and PN signal adding system for audio signal.
Description will be given below on the information to be transmitted and received in this system, referring to Fig. 2 and Fig. 3. Shown in these figures is the information to be transmitted and received in this system, and each information is transmitted and received between broadcasting stations such as BS, CS, CATV, etc., receiving devices with tuner and decoder, charging centers, and data communication devices such as display phones, modem, etc.
The broadcasting station and the receiving device are connected by radio wave or cable, and the charging center and the data communication device are connected by public telephone line. The broadcasting station and the charging center, and further, the receiving device and the data communication device are coupled directly, or by on-line communication means such as radio wave or cable, or by offline means such as magnetic card, magnetic disk or memory card.
Fig. 2 shows a system for viewing a pay broadcasting program. The broadcasting station sends a viewing permit code for viewing a broadcasting program to a charging center before the program is broadcast, and also sends scrambled broadcasting program, which can be descrambled by the viewing permit code, to the receiving device. In this case, a program number for identifying the broadcasting program can be transmitted with the broadcasting program.
When the viewer requests for vieving television program to the charging center via public telephone line using the data communication device, the charging center sends the viewing permit code, which has been sent from the broadcasting station before the program is broadcast, to the data communication device. The viewing permit code sent to the data communication device is sent to the receiving device and the program is descrambled according to the viewing permit code by the receiving device when the desired broadcasting program is broadcast, and the desired program is displayed or recorded when the receiving device outputs the program to a television set (TV) or to a video tape recorder (VTR).
Fig. 3 represents a system to distribute a program such as multiplex teletext broadcasting program. In this broadcasting distribution system, the broadcasting station sends a distribution permit code for distributing a broadcasting program and a program number for identifying the broadcasting program to a charging center before the program is broadcast, and the program such as multiplex teletext broadcasting program, which can be distributed according to the distribution permit code, to the receiving device together with the program number.
When a viewer, who wants to distribute a program, requests the distribution to the charging center via public telephone line, the charging center sends a distribution permit code and a program number, which have been sent from the broadcasting station before the program is broadcast, to the data comaunication device. The distribution permit code and the program number sent to the data communication device are sent to the receiving device when the requested program is broadcast, and the receiving device distributes the program to the display unit (DSP) according to the distribution permit code.
SUMMARY OF THE INVENTION In the charging system according to the present invention, the broadcasting system comprises broadcasting station for broadcasting program via terrestrial waves, CATV, and satellites such as BS, CS, etc. and a charging center for operating the entire charging system.
On the other hand, the viewing system on the side of viewers to view the broadcasting program comprises a receiving device coupled with a tuner/decoder and a data communication device for communicating with the charging center.
It is an object of the present invention to provide a system, by which it is possible to actualize the so-called pay-per-program for vieving each program on pay basis or the so-called pay-per-view for viewingprogram on pay basis without signing a contract, using a charging system.
To attain the above system, it is disclosed in the present invention hor scrambled pattern can be protected, hor tbe program to be viewed is identified, hor a viewing request should be made, and how these means are applied on a pay broadcasting system.
To keep security of the sernmh it is proposed to adopt a method to use a scramble pattern fixed for a certain period, a method to prepare a plurality of scramble patterns and select a scramble from them, or a method to use a scramble pattern by changing it.
For the method to use scramble pattern by fixing it for a certain period, the currently used system can be utilized without any change, but the scramble pattern may be decoded.
In the method to prepare a plurality of scramble patterns and use one of them, it is difficult to decode the scramble patterns because the scramble patterns must be decoded only during the broadcasting of the program, but there may be some possibility to decode the scramble patterns because the same scramble patterns are repeatedly used.
In the method to change scramble pattern for each program, it is virtually impossible to decode the scramble pattern because the scramble pattern must be decoded during the broadcasting of the program.
As the method to identify the program, there are a method to identify according to broadcasting time and a method to provide the broadcasting program itself with an identifying information.
As a method to request for vieving, there are proposed a method to ronest accorrI;r' n the broadcasting time, and a method to request by using an identifying information of the program itself. If the identifying information is not made public, the viewing request is made using a temporary identifying information.
In case the broadcasting program is not identified according to the time, an identifying information is needed.
In case the broadcasting program has an identifying information, which is open, the identifying information is used. If it is not open, a temporary identifying information is used for a viewing request.
The method to identify the program according to the broadcasting time is simple, but it comes to a deadlock if the broadcasting time is changed from some reasons.
In contrast, the method to identify the program according to the identifying information requires more complicated system, but this method can be relied even when the broadcasting time is changed.
The receiving device identifies the program, for which a viewing request has been made and descrambles the requested program using the corresponding decode data.
In case the broadcasting program is identified accord ing to the broadcasting time, the program is descrambled by decode data when it is the specified broadcasting time.
In case the program number is open, the program number in the broadcasting signal is monitored, and the program is descrambled using decode data rhen the program number of the requested program is detected.
In case the program number is not made public, nonopened program number in the broadcasting signal is monitored, and the program is descrambled using decode data when the same program number as encoded number sent from the charging center is detected.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a general block diagram of a system to which the present invention is applied; Fig. 2 is a schematic diagram of the present invention; Fig. 3 is another schematic diagram of the present invention; Fig. 4 is a diagram of a first embodiment of the present invention; Fig. 5 is a diagram of a second embodiment of the present invention; Fig. 6 is a diagram of a third embodiment of the present invention; Fig. 7 is a diagram of a fourth embodiment of the present invention; Fig. 8 is a diagram of a fifth embodiment of the present invention; Fig. 9 is a diagram of a sixth embodiment of the present invention; Fig. 10 is a diagram of a seventh embodiment of the present invention; Fig. 11 is a diagram of an eighth embodiment of the present invention; Fig. 12 is a diagram of a ninth embodiment of the present invention;; Fig. 13 is a diagram of a tenth embodiment of the present invention; Fig. 14 is a diagram of an eleventh embodiment of the present invention; Fig. 15 is a diagram of a twelfth embodiment of the present invention; Fig. 16 is a diagram of a thirteenth embodiment of the present invention; Fig. 17 is a diagram of a fourteenth embodiment of the present invention; Fig. 18 is a diagram of a fifteenth embodiment of the present invention; Fig. 19 is a diagram of a sixteenth embodiment of the present invention; Fig. 20 is a diagram of a seventeenth embodiment of the present invention; Fig. 21 is a diagram of an eighteenth embodiment of the present invention; and Fig. 22 is a diagram of a ninteenth embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Description will be given on the present invention in connection with the drawings.
In the following, description will be given on embodiments of the present invention, referring to Fig. 4 to Fig. 22.
Fig. 4 to Fig. 8 each represents an embodiment, in which a pattern used for scramble is fixed and used, and broadcasting station scrambles the program by a fixed scramble pattern and broadcasts it. Also. the broadcasting station sends a decode data, serving as descramble data, to a charging center before the program is broadcasting from the broadcasting station.
In the embodiment of Fig. 4, no program number is used.
Of course, the broadcasting station may use the program number. but the program number is not used in this system.
A viewer, who wants to view a program. sends a viewing request to the charging center by specifying broadcasting time via public telephone line using a data communication device.
The charging center sends decode data of the program, to which the vieving request has been made, to the data communication device via public telephone line and collects a fee for the program.
The data communication device sends the received decode data and broadcasting time information to a receiving device.
Upon receipt of the decode data and the broadcasting time information, the receiving device descrambles the broadcasting program using the decode data.
When a broadcasting station broadcasts a program, a program number is put on each program for control purpose.
There are the program numbers which are opened or not opened.
Fig. 5 and Fig. 6 each represents an embodiment, which uses an open program number.
In the embodiment shown in Fig. 5, an applicant for viewing a broadcasting program sends a vieving request to the charging center by specifying a program number via public telephone line using a data communication device.
The charging center sends decode data for the broadcasting program, to which the request has been sent, to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data and the program number to the receiving device.
Upon receipt of the decode data and the program number, the receiving device monitors the program number of the receiving program and descrambles the broadcasting program by the received decode data when the program number of the requested program is detected.
In the embodiment of Fig. 6, the broadcasting station sends the program number to the charging center before the program is broadcast from the broadcasting station.
The applicant for viewing the program sends a request for viewing to the charging center by specifying broadcasting time via public telephone line using a data communication device.
The charging ceflter-sends decode data and the program number of the requested broadcasting program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data and the program number to the receiving device.
Upon receipt of the decode data and the program number, the receiving device monitors program number of the receiving program and descrambles the program using the received decode data when the program number of the requested program is detected.
By the system as described above, it is possible for an applicant to request for viewing a program without knowing the program number.
Fig. 7 and Fig. 8 each represents an embodiment, which uses a non-opened program number, which is not open for operation purpose. In these embodiments, the applicant for viewing uses a non-opened program number, and the program number is used as an encoded program number, and the broadcasting station sends the encoded program number to the charging center before the program is broadcast from the broadcasting station.
In the embodiment of Fig. 7, the applicant for viewing sends a request for viewing to the charging center by specifying broadcasting time via public telephone line using the data communication device.
The charging center sends the decode data and the encoded program number of the requested broadcasting program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data and the encoded program number to the receiving device.
Upon receipt of the decode data and the encoded program number, the receiving device monitors the non-opened program number of the receiving program and descrambles the requested program by the decode data when the encoded program of the requested program agrees with the non-opened program number.
In the embodiment of Fig. 8, the encoded program number has a temporary program number for requesting the program, and the broadcasting station also sends this temporary program number to the charging center before the program is broadcast from the broadcasting station.
The applicant for viewing the program sends a request for viewing to the charging center by specifying the temporary program number via public telephone line using the data communication device.
The charging center sends the decode data and an encoded program number corresponding to the temporary program number of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data and the encoded program number to the receiving device.
Upon receipt of the decode data and the encoded program number, the receiving device monitors the non-opened program number of the receiving program, and descrambles the program by the received decode data when the encoded program number of the requested program agrees with the non-opened program number.
Fig. 9 to Fig. 17 each represents an embodiment, in which a plurality of patterns to be used for scramble are prepared and these are selected for each program or for each time period such as day, week, etc., and the broadcasting station scrambles the broadcasting program by a scramble pattern selected from a plurality of scramble patterns.
In the embodiment of Fig. 9, no program number is used.
The applicant for viewing a program sends a request for viewing to the charging center by specifying broadcasting time via public telephone line using the data communication device.
The charging center sends the decode data of the requested broadcasting program via public telephone line to the data communication device, and also collects a fee for the program.
The data communication device sends the received decode data and the broadcasting time information to the receiving device.
Upon receipt of the decode data and the broadcasting time information, the receiving device descrambles the broadcasting program by the decode data rhen it is the specified broadcasting time.
Fig. 10 represents another embodiment, in which no program number is used.
In this embodiment, a plurality of decode data -are provided with decode data number and stored in advance in the receiving device.
The broadcasting station sends a decode data number for identifying the decode data to the charging center before the program is broadcast from the broadcasting station.
The applicant for viewing sends a request for viewing to the charging center by specifying broadcasting time via public telephone line using the data communication device.
The charging center sends the decode data number of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data number and broadcasting time information to the receiving device.
Upon receipt of the decode data number and the broadcasting time information, the receiving device descrambles the program by a decode data corresponding to the decode data number when it is the broadcasting time.
Fig. 11 to Fig. 14 each represents an embodiment, in which program number is used as explained in Fig. 5 and Fig. 6.
In the embodiment of Fig. 11, the applicant for viewing sends a request for vieving to the charging center by specifying broadcasting time using the data communication device via public telephone line.
The charging center sends decode data and a program number of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the program number and the received decode data.
Upon receipt of the decode data and the program number, the receiving device monitors program number of the receiving program, and descrambles the program by the received decode data when the program number of the requested program is detected.
In the embodiment of Fig. 12, a plurality of decode data are provided with decode data numbers and are stored in advance in the receiving device as in the embodiment of Fig.
10.
The broadcasting station sends a decode data number for identifying the decode data to the charging center before the program is broadcast from the broadcasting station.
In this embodiment, the applicant for vieving sends a viewing request to the charging center by specifying broadcasting time via public telephone line using the data communication device.
The charging center sends the decode data number and the program number of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data number and the program number to the receiving device.
Upon receipt of the decode data number and the program number, the receiving device monitors program number of the receiving program, and descrambles the program by a decode data corresponding to the received decode data number when the program number of the requested program is detected.
In the embodiment of Fig. 13, the applicant for viewing sends a viewing request to the charging center by specifying a program number via public telephone line using a data communication device.
The charging center sends decode data of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the program number and the received decode data to the receiving device.
Upon receipt of the decode data and the program number, the receiving device monitors program number of the receiving program and descrambles the program by the received decode data when the program number of the requested program is detected.
In the embodiment of Fig. 14, a plurality of decode data are provided with decode data numbers and are stored in advance in the receiving device as in the embodiment of Fig. 10.
The broadcasting station sends a decode data number for identifying the decode data to the charging center before the program is broadcast from the broadcasting station.
In this embodiment, the applicant for vieving sends a vieving request to the charging center by specifying a program number via public telephone line using the data communication device.
The charging center sends the decode data number of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the program number and the received decode data number to the receiving device, and the receiving device monitors the program number of the receiving program upon receipt of the program number, and descrambles the program by a decode data corresponding to the received decode data number when the program number of the requested program is detected.
Fig. 15 to Fig. 17 each represents an embodiment, in which non-opened program number is used as in the embodiments of Fig. 7 and Fig. 8. In these embodiments, the non-opened program number is encoded and is sent to the charging center before the program is broadcast from the broadcasting station.
In the embodiment of Fig. 15, the applicant for viewing sends a viewing request to the charging center by specie ing broadcasting time via public telephone line using the data communication device.
The charging center sends a decode data and an encoded program number of the requested program to the data communication device via public telephone line, and collects a fee for the program.
The data communication device sends the received decode data and the encoded program number to the receiving device.
Upon receipt of the decode data and the encoded program number, the receiving device monitors non-opened program number of the receiving program, and descrambles the program by the received decode data when the encoded program number of the requested program agrees with the non-opened program number.
In the embodiments shown in Fig. 16 and Fig. 17, a plurality of decode data are provided with decode data numbers and are stored in advance in the receiving device as in the embodiment of Fig. 10.
The broadcasting station sends a decode data number for identifying the decode data to the charging center before the program is broadcast from the broadcasting station.
In the embodiment of Fig. 16, the applicant for viewing sends a viewing request to the charging center by specifying broadcasting time via public telephone line using the data communication device The charging center sends a decode data number and an encoded program number of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data number and the encoded program number to the receiving device.
Upon receipt of the decode data number and the encoded program number, the receiving device monitors non-opened program number of the receiving program, and descrambles the program by a decode data corresponding to the received decode data number when the encoded program number of the requested program agrees with the non-opened program number.
In the embodiment of Fig. 17, the encoded program number is provided with a temporary program number as in the embodiment of Fig. 8.
The broadcasting station sends also the temporary program number to the charging center before the program is broadcast from the broadcasting station.
The applicant for vieving sends a vieving request to the charging center by specifying a temporary program number via public telephone~line using the data communication device.
The charging center sends a decode data number and an encoded program number corresponding to the temporary program number of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data number and the encoded program number to the receiving device.
Upon receipt of the decode data number and the encoded program number, the receiving device monitors non-opened program number of the receiving program, and descrambles the program by a decode data corresponding to the received decode data number when the encoded program number of the requested program agrees with the non-opened program number.
Fig. 18 to Fig. 22 each represents an embodiment, in which pattern used in the scramble is not fixed in advance, and the broadcasting station changes the scramble pattern for each program as appropriate. For this reason, it is impossible to decode the scramble pattern.
In these embodiments, decode data is sent to the charging center in advance from the broadcasting station.
In the embodiment of Fig. 18, the applicant for viewing sends a viewing request to the charging center by specifying broadcasting time via public telephone line using the data communication device.
The charging center sends the decode data of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data and broadcasting time information to the receiving device.
Upon receipt of the decode data and the broadcasting time information, the receiving device descrambles the program by the decode data vhen it is the specified broadcasting time.
Fig. 19 and Fig. 20 each represents an embodiment, in which open program number is used as in Fig. 5 and Fig. 6.
In the embodiment of Fig. 19, the applicant for vieving sends a viewing request to the charging center by specifying the broadcasting time via public telephone line using the data communication device.
The broadcasting station sends the program number to the charging center before the program is broadcast.
The charging center sends the decode data and the program number of the requested program to the data communication device via public telephone line.
The data communication device sends the received program number and the decode data to the receiving device.
Upon receipt of the decode data and the program number, the receiving device monitors program number of the receiving program, and descrambles the program by the received decode data vhen the program number of the requested program is detected.
In the embodiment of Fig. 20, the applicant for viewing sends a viewing request to the charging center by specifying the program number via public telephone line using the data communication device.
The charging center sends the decode data of the requested program to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the program number and the received decode data to the receiving device.
Upon receipt of the program number, the receiving device monitors program number of the receiving program, and descrambles the program by the received decode data rhen the program number of the requested program is detected.
In the embodiments of Fig. 21 and Fig. 22, non-opened program number is used as in the embodiments of Fig. 7 and Fig. 8. In these embodiments, the non-opened program number is encoded and is sent to the charging center before the program is broadcast from the broadcasting station.
In the embodiment of Fig. 21, the applicant for viewing sends a viewing request to the charging center by specifying broadcasting time via public telephone line using the data communication device.
The charging center sends a decode data of the requested program and an encoded program number to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data and the encoded program number to the receiving device.
Upon receipt of the decode data and the encoded program number, the receiving device minotors non-opened program number of the receiving program, and descrambles the program by the received decode data when the encoded program number of the requested program agrees with the non-opened program number.
In the embodiment of Fig. 22, the encoded program number is provided with a temporary program number as in the embodiment of Fig. 8, and the broadcasting station sends this temporary program number to the charging center before the program is broadcast.
The applicant for vieving sends a vieving request to the charging center by specifying a temporary program number via public telephone line using the data communication device.
The charging center sends a decode data of the requested program and an encoded program number corresponding to the temporary program number to the data communication device via public telephone line, and also collects a fee for the program.
The data communication device sends the received decode data and the encoded program number to the receiving device.
Upon receipt of the decode data and the encoded Program number, the receiving device monitors non-opened program number of the receiving program, and descrambles the program by the received decode data when the encoded program number of the requested program agrees with the non-opened program number.
As means for preparing the scramble code, the encoding method disclosed in Japanese Patent Application 4-164380, invented by the inventor of the present invention and filed by the applicant of the present application, may be used to ensure the security of the scramble code.
In the embodiments as described above, data relating to time is limited to "hour". As already explained, however, time information such as month, day, and hour is broadcast together with the program in pay satellite television broadcasting.
By utilizing the above time information, it is possible to achieve Pay-per-vies in hour, day, veek or month.
In Fig. l, a display phone is used as the data communication device 43, while the data communication device may include telephone set capable to achieve data communi cation such as pushbutton telephone, portable telephone, etc. or device such as personal computer, word-processor, coupled with modem.
In the embodiments as described above, description has been given on the charging system for television broadcasting, while the present system can be applied to the other information transmitting means, which requires charging fee for each program, for example, broadcasting and communication means utilizing satellite such as audio broadcasting or data broadcasting, data communication, etc.
or various broadcasting and communication means utilizing terrestrial waves such as audio broadcasting or data broadcasting and data communication such as FM multiplex broadcasting.
Also, in case of data broadcasting, in which the secondary use of the broadcasting program is offered on pay basis, fee can be easily collected without fail if the system of the present invention is applied.
When requesting for viewing the program, it is possible to use program code system currently adopted for video taper according.
By the method to include program code in the broad casting progran as described in the above embodiments, it is possible not only to view the scrambled pay program but also to more reliably perform video tape recording and television receiving of the program offered free if program code is monitored on the receiver side and video tape recording or television receiving is controlled by the program code.
In the above, a charging system for each broadcasting program, i.e. a pay broadcasting system for actualizing pay-per-program has been described.
A pay broadcasting system is also described and claimed in parent British Patent Appln. No. 9321742.0 (Publication No. 2272823A).

Claims (41)

1. A pay broadcasting system, comprising a broadcasting station and a charging
center, whereby: said broadcasting station transmits an open program number together with a broadcasting program scrambled by a scramble pattern changed for each program; said charging center transmits a broadcasting program distribution permit code for distributing a pay program in response to a request for distribution executed through a communication line by specifying said open program number and also collects a fee for said pay program; and a receiving device which has received said broadcasting program distribution permit code descrambles a received pay program according to the broadcasting program distribution permit code.
2. A pay broadcasting system of claim 1 wherein a decode data is transmitted as said broadcasting program distribution permit code.
3. A pay broadcasting system of claim 1 wherein a decode data and said open program number are transmitted as said broadcasting program distribution permit code.
4. A pay broadcasting system of claim 1 wherein collecting a fee for the pay program is executed by home banking system.
5. A pay broadcasting system of claim 1 wherein transmitted said broadcasting program distribution permit code is stored in an IC card, and said broadcasting program distribution permit code stored in the IC card is supplied to said receiving device.
6. A pay broadcasting system, comprising a broadcasting station and a charging center, whereby: said broadcasting station transmits an open data cmmunication program number together with a data communication program scrambled by a scramble pattern changed for each program; said charging center sends a data communication program distribution permit code for distributing a pay data communication program in response to a request for distribution executed through a communication line by specifying said open data communication program number and also collects a fee; and a receiving device which has received said data communication program distribution permit code descrambles a received pay data communication program according to the data communication program distribution permit code.
7. A pay broadcasting system of claim 6 wherein a decode data is tramsmitted as said distribution permit code for a data communication program.
8. A pay broadcasting system of claim 6 wherein a decode data and the open data communication program number are transmitted as said distribution permit code for a data communication program.
9. A pay broadcasting system of claim 6 wherein collecting a fee for the pay data communication program is executed by home banking system.
10. A pay broadcasting system of claim 3 wherein transmitted data communication program use permit code is stored in an IC card and said data communication program distribution permit code stored in IC card is supplied to said receiving device.
11. A pay broadcasting system, comprising a broadcasting station and a charging center, whereby: said broadcasting station transmits an open broadcasting program number together with a broadcasting program scrambled with one scramble pattern selected from a plurality of scramble patterns; said charging center transmits a broadcasting program distribution permit code for distributing a pay broadcasting program in response to a request for distribution executed through a communication line by specifying said open broadcasting program number and also collects a fee; and a receiving device which has received said broadcasting program distribution permit code descrambles a received pay broadcasting program according to said broadcasting program distribution permit code.
12. A pay broadcasting system of claim 11 wherein a decode data is transmitted as said distribution permit code for a broadcasting program.
13. A pay broadcasting system of claim 11 wherein the decode data and said open broadcasting program number are transmitted as said distribution permit code for a broadcasting program.
14. A pay broadcasting system of claim 11 wherein collecting a fee is executed by home banking system.
15. A pay broadcasting system of claim 11 wherein transmitted broadcasting program distribution permit code is stored in an IC card and said broadcasting program distribution permit code stored in IC card is supplied to said receiving device.
16. A pay broadcasting system, comprising a broadcasting station and a charging center, whereby: said broadcasting station transmits an open data communication program number together with a data communication program scrambled with one scramble pattern selected from a plurality of scramble patterns; said charging center transmits a data communication program distribution permit code for distributing a pay data communication program in response to a request for distribution executed through a communication line by specifying said data communication program number and also collects a fee; and a receiving device which has received said data communication program distribution permit code descrambles a received pay data communication program according to said data communication program distribution permit code.
17. A pay broadcasting system of claim 16 wherein a decode data is transmitted as said distribution permit code for a data communication program.
18. A pay broadcasting system of claim 16 wherein the decode data and said open data communication program number are transmitted as said distribution permit code for a data communication program.
19. A pay broadcasting system of claim 16 wherein collecting a fee is executed by home banking system.
20. A pay broadcasting system of claim 16 wherein transmitted data communication program distribution permit code is stored in an IC card and said data communication program distribution permit code stored in IC card is supplied to said receiving device.
21. A pay broadcasting system, comprising a broadcasting station and a charging center, whereby: said broadcasting station transmits a non- opened broadcasting program number together with a broadcasting program scrambled by a scramble pattern changed for each program; said charging center transmits a broadcasting program distribution permit code for distributing a pay broadcasting program in response to a request for distribution executed through a communication line by specifying a temporary broadcasting program number and also collects a fee; and a receiving device which has received said broadcasting program distribution permit code descrambles a received broadcasting program according to said broadcasting program distribution permit code.
22. A pay broadcasting system of claim 21 wherein a decode data is transmitted as said distribution permit code for a broadcasting program.
23. A pay broadcasting system of claim 21 wherein the decode data and said non- opened broadcasting program number are transmitted as said distribution permit code for a broadcasting program.
24. A pay broadcasting system of claim 21 wherein collecting a fee is executed by home banking system.
25. A pay broadcasting system of claim 21 wherein transmitted broadcasting program distribution permit code is stored in an IC card and said broadcasting program distribution permit code stored in IC card is supplied to said receiving device.
26. A pay broadcasting system, comprising a broadcasting station and a charging center, whereby: said broadcasting station transmits a non- opened data communication program number together with a data communication program scrambled by a scramble pattern changed for each program; said charging center transmits a data communication program distribution permit code for distributing a pay data communication program in response to a request for distribution executed through a communication line by specifying a temporary data communication program number and also collects a fee; and a receiving device which has received said data communication program distribution permit code descrambles a received data communication program according to said data communication program distribution permit code.
27. A pay broadcasting system of claim 26 wherein a decode data is transmitted as said distribution permit code for a data communication program.
28. A pay broadcasting system of claim 26 wherein the decode data and the non- opened data communication program number are transmitted as said distribution permit code for a data communication program.
29. A pay broadcasting system of claim 26 wherein collecting a fee is executed by home banking system.
30. A pay broadcasting system of claim 26 wherein transmitted data communication program distribution permit code is stored in an IC card and said data communication program distribution permit code stored in IC card is supplied to said receiving device.
31. A pay broadcasting system, comprising a broadcasting station and a charging center, whereby: said broadcasting station transmits a non- opened broadcasting program number together with a broadcasting program scrambled with one scramble pattern selected from a plurality of scramble patterns; said charging center transmits a broadcasting program distribution permit code for distributing a pay broadcasting program in response to a request for distribution executed through a communication line by specifying a temporary broadcasting program number and also collects a fee; and a receiving device which has received said broadcasting program distribution permit code descrambles a received broadcasting program according to said broadcasting program distribution permit code.
32. A pay broadcasting system of claim 31 wherein a decode data is transmitted as said distribution permit code for a broadcasting program.
33. A pay broadcasting system of claim 31 wherein the decode data and said non- opened broadcasting program number are transmitted as said distribution permit code for a broadcasting program.
34. A pay broadcasting system of claim 31 wherein collecting a fee is executed by home banking system.
35. A pay broadcasting system of claim 31 wherein transmitted broadcasting program distribution permit code is stored in an IC card and said broadcasting program distribution permit code stored in IC card is supplied to said receiving device.
36. A pay broadcasting system, comprising a broadcasting station and a charging center, whereby: said broadcasting station transmits a non- opened data communication program number together with a data communication program scrambled with one scramble pattern selected from a plurality of scramble patterns; said charging center transmits a data communication program distribution permit code for distributing a pay data communication program in response to a request for distribution executed through a communication line by specifying a temporary data communication program number and also collects a fee; and a receiving device which has received said data communication program distribution permit code descrambles a received data communication program according to said data communication program distribution permit code.
37. A pay broadcasting system of claim 36 wherein a decode data is transmitted as said distribution permit code for a data communication program.
38. A pay broadcasting system of claim 36 wherein the decode data and the non-opened data communication program number are transmitted as said distribution permit code for a data communication program.
39. A pay broadcasting system of claim 36 wherein collecting a fee is executed by home banking system.
40. A pay broadcasting system of claim 36 wherein transmitted data communication program distribution permit code is stored in an IC card and said data communication program distribution permit code stored in IC card is supplied to said receiving device.
41. A pay broadcasting system in accordance with an embodiment of this present invention and substantially as hereinbefore described with reference to, and as ilius ted in, the accompanying drawings.
GB9526342A 1992-10-27 1993-10-21 Pay broadcasting system Expired - Fee Related GB2295947B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9621915A GB2305832B (en) 1992-10-27 1993-10-21 Pay broadcasting system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4289074A JPH06141004A (en) 1992-10-27 1992-10-27 Charging system
GB9321742A GB2272823B (en) 1992-10-27 1993-10-21 Pay broadcasting system

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US7844835B2 (en) 1995-02-13 2010-11-30 Intertrust Technologies Corporation Systems and methods for secure transaction management and electronic rights protection
US7917749B2 (en) 1995-02-13 2011-03-29 Intertrust Technologies Corporation Systems and methods for secure transaction management and electronic rights protection
US8185473B2 (en) 1995-02-13 2012-05-22 Intertrust Technologies Corporation Trusted infrastructure support systems, methods and techniques for secure electronic commerce, electronic transactions, commerce process control and automation, distributed computing, and rights management
US8190528B2 (en) 1995-02-13 2012-05-29 Intertrust Technologies Corporation Trusted infrastructure support systems, methods and techniques for secure electronic commerce, electronic transactions, and rights management
US8543842B2 (en) 1995-02-13 2013-09-24 Intertrust Technologies Corporation System and methods for secure transaction management and electronics rights protection
US8751793B2 (en) 1995-02-13 2014-06-10 Intertrust Technologies Corp. Trusted infrastructure support systems, methods and techniques for secure electronic commerce transaction and rights management
US8510226B2 (en) 1996-02-26 2013-08-13 Graphon Corporation Method for synchronous encryption between a client and a licensing agent
US7925898B2 (en) 1996-08-12 2011-04-12 Intertrust Technologies Corp. Systems and methods using cryptography to protect secure computing environments
US8307212B2 (en) 1996-08-12 2012-11-06 Intertrust Technologies Corp. Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels
US8533851B2 (en) 1996-08-30 2013-09-10 Intertrust Technologies Corporation Systems and methods for secure transaction management and electronic rights protection
WO1998010381A1 (en) * 1996-09-04 1998-03-12 Intertrust Technologies Corp. Trusted infrastructure support systems, methods and techniques for secure electronic commerce, electronic transactions, commerce process control and automation, distributed computing, and rights management

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GB2295947B (en) 1997-08-13

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Effective date: 20041021