BR9408551A - Apparatus for processing a data stream in a reception system from a communications channel a digital data stream from a video signal including encrypted information and unencrypted information - Google Patents

Apparatus for processing a data stream in a reception system from a communications channel a digital data stream from a video signal including encrypted information and unencrypted information

Info

Publication number
BR9408551A
BR9408551A BR9408551A BR9408551A BR9408551A BR 9408551 A BR9408551 A BR 9408551A BR 9408551 A BR9408551 A BR 9408551A BR 9408551 A BR9408551 A BR 9408551A BR 9408551 A BR9408551 A BR 9408551A
Authority
BR
Brazil
Prior art keywords
data stream
information
video signal
processing
signal including
Prior art date
Application number
BR9408551A
Other languages
Portuguese (pt)
Inventor
Peter Michael Murphy
Original Assignee
Thomson Consumer Electronics
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 filed Critical Thomson Consumer Electronics
Priority to AU66969/94A priority Critical patent/AU6696994A/en
Priority to EP94914715A priority patent/EP0750821A4/en
Priority to PCT/US1994/002979 priority patent/WO1995026107A1/en
Priority to BR9408551A priority patent/BR9408551A/en
Priority to JP7524610A priority patent/JPH09510593A/en
Priority to SG1995000109A priority patent/SG24103A1/en
Publication of BR9408551A publication Critical patent/BR9408551A/en

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
BR9408551A 1994-03-18 1994-03-18 Apparatus for processing a data stream in a reception system from a communications channel a digital data stream from a video signal including encrypted information and unencrypted information BR9408551A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU66969/94A AU6696994A (en) 1994-03-18 1994-03-18 Data decryption apparatus in a subscription television signal receiving system
EP94914715A EP0750821A4 (en) 1994-03-18 1994-03-18 Data decryption apparatus in a subscription television signal receiving system
PCT/US1994/002979 WO1995026107A1 (en) 1994-03-18 1994-03-18 Data decryption apparatus in a subscription television signal receiving system
BR9408551A BR9408551A (en) 1994-03-18 1994-03-18 Apparatus for processing a data stream in a reception system from a communications channel a digital data stream from a video signal including encrypted information and unencrypted information
JP7524610A JPH09510593A (en) 1994-03-18 1994-03-18 Data decryption device for pay television signal receiving system
SG1995000109A SG24103A1 (en) 1994-03-18 1995-03-16 Data decryption apparatus in a subscription television signal receiving system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1994/002979 WO1995026107A1 (en) 1994-03-18 1994-03-18 Data decryption apparatus in a subscription television signal receiving system
BR9408551A BR9408551A (en) 1994-03-18 1994-03-18 Apparatus for processing a data stream in a reception system from a communications channel a digital data stream from a video signal including encrypted information and unencrypted information

Publications (1)

Publication Number Publication Date
BR9408551A true BR9408551A (en) 1997-08-19

Family

ID=25664661

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9408551A BR9408551A (en) 1994-03-18 1994-03-18 Apparatus for processing a data stream in a reception system from a communications channel a digital data stream from a video signal including encrypted information and unencrypted information

Country Status (5)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100952799B1 (en) * 2002-01-02 2010-04-14 소니 일렉트로닉스 인코포레이티드 Decoding and decryption of partially encrypted information
CN100423575C (en) * 2002-12-25 2008-10-01 潍坊北大青鸟华光电子有限公司 Method for controlling digital TV receive

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
EP0626793B1 (en) * 1986-04-18 2001-11-28 Nagra Plus S.A. Pay television system
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 (en) * 1989-12-08 1992-01-24 Europ Rech Electr Lab METHOD FOR PROMOTING TELEVISION TELEVISION TRANSMISSIONS AND DEVICE FOR IMPLEMENTING SAME.
JPH0549029A (en) * 1991-08-09 1993-02-26 Sony Corp Channel selection system for tv signal
JPH05130604A (en) * 1991-11-06 1993-05-25 Sony Corp Receiving equipment for scramble signal
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
AU6696994A (en) 1995-10-09
JPH09510593A (en) 1997-10-21
WO1995026107A1 (en) 1995-09-28
EP0750821A4 (en) 1997-07-23
EP0750821A1 (en) 1997-01-02

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Legal Events

Date Code Title Description
FF Decision: intention to grant
FA11 Dismissal: dismissal - article 38, par. 2 of industrial property law