WO2007113802A3 - Key management system - Google Patents

Key management system Download PDF

Info

Publication number
WO2007113802A3
WO2007113802A3 PCT/IL2007/000387 IL2007000387W WO2007113802A3 WO 2007113802 A3 WO2007113802 A3 WO 2007113802A3 IL 2007000387 W IL2007000387 W IL 2007000387W WO 2007113802 A3 WO2007113802 A3 WO 2007113802A3
Authority
WO
WIPO (PCT)
Prior art keywords
control word
ssa
fsa
content
result
Prior art date
Application number
PCT/IL2007/000387
Other languages
French (fr)
Other versions
WO2007113802A2 (en
Inventor
Chaim Shen-Orr
Eliphaz Hibshoosh
Yaacov Belenky
Gabi Ickowicz
Original Assignee
Nds Ltd
Chaim Shen-Orr
Eliphaz Hibshoosh
Yaacov Belenky
Gabi Ickowicz
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 IL174755A external-priority patent/IL174755A0/en
Priority claimed from IL178213A external-priority patent/IL178213A0/en
Application filed by Nds Ltd, Chaim Shen-Orr, Eliphaz Hibshoosh, Yaacov Belenky, Gabi Ickowicz filed Critical Nds Ltd
Publication of WO2007113802A2 publication Critical patent/WO2007113802A2/en
Publication of WO2007113802A3 publication Critical patent/WO2007113802A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • 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, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream decryption
    • 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, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4408—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled

Abstract

A key management method including receiving content scrambled with a first scrambling algorithm (FSA), determining whether to descramble the content according to a first rule and producing a first result, only if the first result indicates that the content should be descrambled, descrambling the content according to an FSA control word, determining whether to apply a second scrambling algorithm (SSA) according to a second rule and producing a second result, and only if the second result indicates that the SSA should be applied, applying the SSA, the applying the SSA including re-scrambling according to a SSA control word, wherein the FSA control word changes at an FSA control word change time, and the method also includes changing the SSA control word in lockstep fashion with the FSA control word, such that each change of the FSA control word causes a change of the SSA control word. Related methods and apparatus are also described.
PCT/IL2007/000387 2006-04-03 2007-03-25 Key management system WO2007113802A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IL174755A IL174755A0 (en) 2006-04-03 2006-04-03 Key management system
IL174755 2006-04-03
IL178213 2006-09-20
IL178213A IL178213A0 (en) 2006-09-20 2006-09-20 Key management system

Publications (2)

Publication Number Publication Date
WO2007113802A2 WO2007113802A2 (en) 2007-10-11
WO2007113802A3 true WO2007113802A3 (en) 2009-04-09

Family

ID=38564063

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2007/000387 WO2007113802A2 (en) 2006-04-03 2007-03-25 Key management system

Country Status (1)

Country Link
WO (1) WO2007113802A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5937067A (en) * 1996-11-12 1999-08-10 Scientific-Atlanta, Inc. Apparatus and method for local encryption control of a global transport data stream
US20030002577A1 (en) * 2001-06-29 2003-01-02 Pinder Howard G. In a subscriber network receiving digital packets and transmitting digital packets below a predetermined maximum bit rate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5937067A (en) * 1996-11-12 1999-08-10 Scientific-Atlanta, Inc. Apparatus and method for local encryption control of a global transport data stream
US20030002577A1 (en) * 2001-06-29 2003-01-02 Pinder Howard G. In a subscriber network receiving digital packets and transmitting digital packets below a predetermined maximum bit rate

Also Published As

Publication number Publication date
WO2007113802A2 (en) 2007-10-11

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