AU6696994A - Data decryption apparatus in a subscription television signal receiving system - Google Patents

Data decryption apparatus in a subscription television signal receiving system

Info

Publication number
AU6696994A
AU6696994A AU66969/94A AU6696994A AU6696994A AU 6696994 A AU6696994 A AU 6696994A AU 66969/94 A AU66969/94 A AU 66969/94A AU 6696994 A AU6696994 A AU 6696994A AU 6696994 A AU6696994 A AU 6696994A
Authority
AU
Australia
Prior art keywords
signal receiving
receiving system
television signal
data decryption
decryption apparatus
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.)
Abandoned
Application number
AU66969/94A
Other languages
English (en)
Inventor
Peter Michael Murphy
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.)
Technicolor USA Inc
Original Assignee
Thomson Consumer Electronics Inc
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 Thomson Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Publication of AU6696994A publication Critical patent/AU6696994A/en
Abandoned 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
    • H04L9/06—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
    • 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
    • H04L2209/12—Details relating to cryptographic hardware or logic circuitry
    • H04L2209/125—Parallelization or pipelining, e.g. for accelerating processing of cryptographic operations
    • 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
    • H04L2209/24—Key scheduling, i.e. generating round keys or sub-keys for block 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
    • H04L2209/34—Encoding or coding, e.g. Huffman coding or error correction
    • 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)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Error Detection And Correction (AREA)
AU66969/94A 1994-03-18 1994-03-18 Data decryption apparatus in a subscription television signal receiving system Abandoned AU6696994A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR9408551A BR9408551A (pt) 1994-03-18 1994-03-18 Aparelho para o processamento de fluxo de dados em um sistema de recepção a partir de um canal de comunicações um fluxo de dados digitais de um sinal de vídeo incluindo informações criptografadas e informações não criptografadas
PCT/US1994/002979 WO1995026107A1 (en) 1994-03-18 1994-03-18 Data decryption apparatus in a subscription television signal receiving system

Publications (1)

Publication Number Publication Date
AU6696994A true AU6696994A (en) 1995-10-09

Family

ID=25664661

Family Applications (1)

Application Number Title Priority Date Filing Date
AU66969/94A Abandoned AU6696994A (en) 1994-03-18 1994-03-18 Data decryption apparatus in a subscription television signal receiving system

Country Status (5)

Country Link
EP (1) EP0750821A4 (pt)
JP (1) JPH09510593A (pt)
AU (1) AU6696994A (pt)
BR (1) BR9408551A (pt)
WO (1) WO1995026107A1 (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MXPA04006442A (es) * 2002-01-02 2004-10-04 Sony Electronics Inc Encriptacion parcial y mapeo de pid.
CN100423575C (zh) * 2002-12-25 2008-10-01 潍坊北大青鸟华光电子有限公司 一种控制数字电视收视的方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167700A (en) * 1977-05-02 1979-09-11 Motorola, Inc. Digital voice protection system and method
ES2169054T3 (es) * 1986-04-18 2002-07-01 Nagra Plus Sa Sistema de television de pago.
US4944006A (en) * 1987-03-12 1990-07-24 Zenith Electronics Corporation Secure data packet transmission system and method
US5001554A (en) * 1988-12-23 1991-03-19 Scientific-Atlanta, Inc. Terminal authorization method
FR2655802B1 (fr) * 1989-12-08 1992-01-24 Europ Rech Electr Lab Procede de promotion d'emissions de television a peage et dispositif de mise en óoeuvre.
JPH0549029A (ja) * 1991-08-09 1993-02-26 Sony Corp Ｔｖ信号の選局システム
JPH05130604A (ja) * 1991-11-06 1993-05-25 Sony Corp スクランブル信号の受信装置
US5247364A (en) * 1991-11-29 1993-09-21 Scientific-Atlanta, Inc. Method and apparatus for tuning data channels in a subscription television system having in-band data transmissions

Also Published As

Publication number Publication date
JPH09510593A (ja) 1997-10-21
EP0750821A1 (en) 1997-01-02
EP0750821A4 (en) 1997-07-23
BR9408551A (pt) 1997-08-19
WO1995026107A1 (en) 1995-09-28

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