GB8432009D0 - Conditional-access broadcast transmission - Google Patents

Conditional-access broadcast transmission

Info

Publication number
GB8432009D0
GB8432009D0 GB848432009A GB8432009A GB8432009D0 GB 8432009 D0 GB8432009 D0 GB 8432009D0 GB 848432009 A GB848432009 A GB 848432009A GB 8432009 A GB8432009 A GB 8432009A GB 8432009 D0 GB8432009 D0 GB 8432009D0
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.)
Withdrawn
Application number
GB848432009A
Other versions
GB2151886A (en
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
Priority claimed from GB08333987A external-priority patent/GB2132860B/en
Application filed by British Broadcasting Corp filed Critical British Broadcasting Corp
Publication of GB8432009D0 publication Critical patent/GB8432009D0/en
Publication of GB2151886A publication Critical patent/GB2151886A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
    • H04L9/0625—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation with splitting of the data block into left and right halves, e.g. Feistel based algorithms, DES, FEAL, IDEA or KASUMI
    • 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
    • H04L9/0891—Revocation or update of secret information, e.g. encryption key update or rekeying
    • 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
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3226—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using a predetermined code, e.g. password, passphrase or PIN
    • 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
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
    • 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
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
    • 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
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • 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
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/601—Broadcast encryption
    • 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
    • H04L2209/80—Wireless

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
GB08432009A 1983-12-21 1984-12-19 Conditional-access broadcast transmission Withdrawn GB2151886A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08333987A GB2132860B (en) 1982-12-21 1983-12-21 Conditional -access broadcast transmission
GB8400788 1984-01-12

Publications (2)

Publication Number Publication Date
GB8432009D0 true GB8432009D0 (en) 1985-01-30
GB2151886A GB2151886A (en) 1985-07-24

Family

ID=26287125

Family Applications (1)

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

Country Status (1)

Country Link
GB (1) GB2151886A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184272A (en) * 1985-11-25 1987-06-17 Philips Electronic Associated Interface between a receiver and a sub-system
GB2183378A (en) * 1985-11-25 1987-06-03 Philips Electronic Associated Receiving scrambled signals
US4791669A (en) * 1985-11-30 1988-12-13 Nec Corporation Encryption/decryption system
US5208856A (en) * 1988-12-23 1993-05-04 Laboratoire Europeen De Recherches Electroniques Avancees Scrambling and unscrambling method for composite video signals and implementing device
FR2641152B1 (en) * 1988-12-23 1996-05-10 Europ Rech Electr Lab
US5029207A (en) 1990-02-01 1991-07-02 Scientific-Atlanta, Inc. External security module for a television signal decoder
US5111504A (en) * 1990-08-17 1992-05-05 General Instrument Corporation Information processing apparatus with replaceable security element
EP0970585A2 (en) * 1998-01-23 2000-01-12 Koninklijke Philips Electronics N.V. Conditional access

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2249257A1 (en) * 1972-10-07 1974-04-11 Itt Ind Gmbh Deutsche PROCEDURE FOR CHANGING THE FREQUENCIES OF A MESSAGE SIGNAL
CH596716A5 (en) * 1974-07-19 1978-03-15 Siemens Ag
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
EP0095923A3 (en) * 1982-06-02 1985-08-21 THE PLESSEY COMPANY plc Communications scrambling systems
CA1253616A (en) * 1982-07-29 1989-05-02 Robert W. Field Secure coding and decoding system and method for television program signals
JPS59107658A (en) * 1982-12-10 1984-06-21 Nec Corp Method and apparatus of private talk
GB2132860B (en) * 1982-12-21 1987-03-18 British Broadcasting Corp Conditional -access broadcast transmission
GB2140656A (en) * 1983-05-13 1984-11-28 Philips Electronic Associated Television transmission system

Also Published As

Publication number Publication date
GB2151886A (en) 1985-07-24

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)