WO2006040708A3 - Method and device for encrypting a data stream - Google Patents

Method and device for encrypting a data stream Download PDF

Info

Publication number
WO2006040708A3
WO2006040708A3 PCT/IB2005/053237 IB2005053237W WO2006040708A3 WO 2006040708 A3 WO2006040708 A3 WO 2006040708A3 IB 2005053237 W IB2005053237 W IB 2005053237W WO 2006040708 A3 WO2006040708 A3 WO 2006040708A3
Authority
WO
WIPO (PCT)
Prior art keywords
data
data stream
encrypting
stream
decompression
Prior art date
Application number
PCT/IB2005/053237
Other languages
French (fr)
Other versions
WO2006040708A2 (en
Inventor
Robert A Brondijk
Original Assignee
Koninkl Philips Electronics Nv
Robert A Brondijk
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 Koninkl Philips Electronics Nv, Robert A Brondijk filed Critical Koninkl Philips Electronics Nv
Publication of WO2006040708A2 publication Critical patent/WO2006040708A2/en
Publication of WO2006040708A3 publication Critical patent/WO2006040708A3/en

Links

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]
    • H04N21/20—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, manipulating MPEG-4 scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
    • H04N21/23476—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption by partially encrypting, e.g. encrypting the ending portion of a movie
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

A method is described for transferring an encrypted data stream which comprises compressed payload data and control data, the control data comprising decompression control data necessary for decompression of the payload data, wherein the payload data is transferred as non-encrypted data, the decompression control data is transferred as encrypted data, the data stream may be an audio/video stream, for example an MPEG-stream.
PCT/IB2005/053237 2004-10-14 2005-10-03 Method and device for encrypting a data stream WO2006040708A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04105040.2 2004-10-14
EP04105040 2004-10-14

Publications (2)

Publication Number Publication Date
WO2006040708A2 WO2006040708A2 (en) 2006-04-20
WO2006040708A3 true WO2006040708A3 (en) 2006-07-13

Family

ID=35463652

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/053237 WO2006040708A2 (en) 2004-10-14 2005-10-03 Method and device for encrypting a data stream

Country Status (2)

Country Link
TW (1) TW200627955A (en)
WO (1) WO2006040708A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5805700A (en) * 1996-10-15 1998-09-08 Intel Corporation Policy based selective encryption of compressed video data
CA2405901A1 (en) * 2001-10-26 2003-04-26 Sony Electronics Inc. Critical packet partial encryption
US20040028227A1 (en) * 2002-08-08 2004-02-12 Yu Hong Heather Partial encryption of stream-formatted media

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5805700A (en) * 1996-10-15 1998-09-08 Intel Corporation Policy based selective encryption of compressed video data
CA2405901A1 (en) * 2001-10-26 2003-04-26 Sony Electronics Inc. Critical packet partial encryption
US20040028227A1 (en) * 2002-08-08 2004-02-12 Yu Hong Heather Partial encryption of stream-formatted media

Also Published As

Publication number Publication date
WO2006040708A2 (en) 2006-04-20
TW200627955A (en) 2006-08-01

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