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GB2132860B - Conditional -access broadcast transmission - Google Patents

Conditional -access broadcast transmission

Info

Publication number
GB2132860B
GB2132860B GB08333987A GB8333987A GB2132860B GB 2132860 B GB2132860 B GB 2132860B GB 08333987 A GB08333987 A GB 08333987A GB 8333987 A GB8333987 A GB 8333987A GB 2132860 B GB2132860 B GB 2132860B
Authority
GB
United Kingdom
Prior art keywords
conditional
broadcast transmission
access broadcast
access
transmission
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.)
Expired
Application number
GB08333987A
Other versions
GB8333987D0 (en
GB2132860A (en
Inventor
John Philip Chambers
Stanley Makinson Edwardson
Derek Thomas Wright
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.)
British Broadcasting Corp
Original Assignee
British Broadcasting 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
Application filed by British Broadcasting Corp filed Critical British Broadcasting Corp
Publication of GB8333987D0 publication Critical patent/GB8333987D0/en
Publication of GB2132860A publication Critical patent/GB2132860A/en
Priority to GB08432009A priority Critical patent/GB2151886A/en
Application granted granted Critical
Publication of GB2132860B publication Critical patent/GB2132860B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/215—Individual registration on entry or exit involving the use of a pass the system having a variable access-code, e.g. varied as a function of time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/088—Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/56—Financial cryptography, e.g. electronic payment or e-cash
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/601—Broadcast encryption

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
GB08333987A 1982-12-21 1983-12-21 Conditional -access broadcast transmission Expired GB2132860B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08432009A GB2151886A (en) 1983-12-21 1984-12-19 Conditional-access broadcast transmission

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8236350 1982-12-21
GB8313295 1983-05-13

Publications (3)

Publication Number Publication Date
GB8333987D0 GB8333987D0 (en) 1984-02-01
GB2132860A GB2132860A (en) 1984-07-11
GB2132860B true GB2132860B (en) 1987-03-18

Family

ID=26284750

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08333987A Expired GB2132860B (en) 1982-12-21 1983-12-21 Conditional -access broadcast transmission

Country Status (1)

Country Link
GB (1) GB2132860B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151886A (en) * 1983-12-21 1985-07-24 British Broadcasting Corp Conditional-access broadcast transmission
JPS6120442A (en) * 1984-07-09 1986-01-29 Toshiba Corp Chargeable broadcasting system
US4709266A (en) * 1985-01-14 1987-11-24 Oak Industries Inc. Satellite scrambling communication network using geographically separated uplinks
US5007084A (en) * 1988-08-29 1991-04-09 Richard H. Materna Payment Authorization and Information Device
FR2654567B1 (en) * 1989-11-14 1995-07-28 Europ Rech Electr Lab EQUIPMENT FOR RECEIVING INTERFERRED TELEVISION BROADCASTS.
GB9003325D0 (en) * 1990-02-14 1990-04-11 Enfranchise Sixty Ltd Apparatus and method for controlling access to broadcast signals
US5151938A (en) * 1990-03-13 1992-09-29 General Instrument Corporation Security enhancement in a data processor through use of dynamic parameter authentication
EP0450841B1 (en) * 1990-03-29 1996-08-21 Gte Laboratories Incorporated Video control system
FR2703552A1 (en) * 1993-03-31 1994-10-07 Philips Electronics Nv Method and apparatus for scrambling and descrambling a specific television program
DE4425973C1 (en) * 1994-07-21 1995-04-20 Grundig Emv Method for adaptively determining the transmission capacity of a transmission channel
JP4491069B2 (en) * 1995-10-31 2010-06-30 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Time shift limited access
US6987854B2 (en) 1997-09-25 2006-01-17 Thomson Licensing S.A. Method and apparatus for recording of encrypted digital data
EP1260042B1 (en) * 2000-02-29 2008-09-03 Kabushiki Kaisha Kenwood Data distribution system and method
DE10103406A1 (en) * 2001-01-26 2002-08-01 Deutsche Telekom Ag Fully automatic determination of scope of use of paid for coded transmitted program contents involves passing content provider number in signals representing contents
IL144369A (en) 2001-07-17 2009-06-15 Eli Yanovsky Secure communication system and method using shared random source for key changing
EP1540877A4 (en) * 2002-07-16 2008-01-30 King Green Ltd Secure communication system and method using shared random source for key changing
FR2862826B1 (en) * 2003-11-26 2006-01-13 Sagem ANTI-THEFT PROTECTION SYSTEM FOR VIDEO-PROJECTOR

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919462A (en) * 1973-08-15 1975-11-11 System Dev Corp Method and apparatus for scrambling and unscrambling communication signals
GB1602119A (en) * 1977-11-18 1981-11-04 Shiu Hung Cheung Pay-tv system
FR2454664A1 (en) * 1979-04-20 1980-11-14 Telediffusion Fse SYSTEM FOR ENCRYPTION AND DECRYPTION OF AN ANALOGUE SIGNAL BY TIME COMPRESSIONS AND EXPANSIONS
GB2067871A (en) * 1980-01-19 1981-07-30 Marconi Co Ltd Information Encoding Systems

Also Published As

Publication number Publication date
GB8333987D0 (en) 1984-02-01
GB2132860A (en) 1984-07-11

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20031220