WO2008052141A3 - Methods and apparatus for content scrambling in a communications system - Google Patents

Methods and apparatus for content scrambling in a communications system Download PDF

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Publication number
WO2008052141A3
WO2008052141A3 PCT/US2007/082576 US2007082576W WO2008052141A3 WO 2008052141 A3 WO2008052141 A3 WO 2008052141A3 US 2007082576 W US2007082576 W US 2007082576W WO 2008052141 A3 WO2008052141 A3 WO 2008052141A3
Authority
WO
WIPO (PCT)
Prior art keywords
scrambling
methods
transport stream
descrambling
aes
Prior art date
Application number
PCT/US2007/082576
Other languages
French (fr)
Other versions
WO2008052141A2 (en
Original Assignee
Verizon Services Org 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 Verizon Services Org Inc filed Critical Verizon Services Org Inc
Priority to EP20070868584 priority Critical patent/EP2076985A4/en
Publication of WO2008052141A2 publication Critical patent/WO2008052141A2/en
Publication of WO2008052141A3 publication Critical patent/WO2008052141A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
    • H04H60/23—Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography, e.g. encryption, authentication, key distribution
    • 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
    • H04L9/0631—Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
    • 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
    • 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
    • H04N21/26606—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 entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
    • 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
    • H04L2209/30—Compression, e.g. Merkle-Damgard construction
    • 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

Abstract

Methods and apparatus for improved scrambling and/or descrambling of packets in a communications network are described, e.g., improved scrambling/descrambling of MPEG-2 transport stream packets over an Internet Protocol network. Advance Encryption Standard (AES) under cipher block chaining is utilized in scrambling some transport stream packets. Methods and apparatus for computing an initialization vector or vectors used by the AES are also described. The initialization vector can be set to either a constant or a programmable random number. Scrambling methods and apparatus directed to scrambling solitary termination blocks with a reduced size packet payload e.g., less than 128 bits in an MPEG-2 transport stream packet, are also described. Various features are useful for and can be implemented in set-top boxes and IPTV scramblers in the headsets.
PCT/US2007/082576 2006-10-25 2007-10-25 Methods and apparatus for content scrambling in a communications system WO2008052141A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070868584 EP2076985A4 (en) 2006-10-25 2007-10-25 Methods and apparatus for content scrambling in a communications system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/588,065 2006-10-25
US11/588,065 US8345713B2 (en) 2006-10-25 2006-10-25 Methods and apparatus for content scrambling in a communications system

Publications (2)

Publication Number Publication Date
WO2008052141A2 WO2008052141A2 (en) 2008-05-02
WO2008052141A3 true WO2008052141A3 (en) 2008-08-28

Family

ID=39325443

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/082576 WO2008052141A2 (en) 2006-10-25 2007-10-25 Methods and apparatus for content scrambling in a communications system

Country Status (4)

Country Link
US (1) US8345713B2 (en)
EP (1) EP2076985A4 (en)
CN (1) CN101554004A (en)
WO (1) WO2008052141A2 (en)

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US8971305B2 (en) * 2007-06-05 2015-03-03 Qualcomm Incorporated Pseudo-random sequence mapping in wireless communications
US8509439B2 (en) * 2007-12-31 2013-08-13 Intel Corporation Assigning nonces for security keys
US8818019B2 (en) 2009-06-08 2014-08-26 Cisco Technology Inc Robust watermark
US8675864B2 (en) * 2010-09-14 2014-03-18 CompuGroup Medical AG Apparatus for encrypting data
CN102238003B (en) * 2011-03-17 2015-11-04 中国电力科学研究院 A kind of production method of root key
US8725788B2 (en) * 2011-05-27 2014-05-13 Adobe Systems Incorporated System and method for decryption of content including partial-block discard
US8687809B2 (en) * 2011-05-27 2014-04-01 Adobe Systems Incorporated System and method for decryption of content including disconnected encryption chains
CN105577364B (en) 2011-10-27 2019-11-05 华为技术有限公司 A kind of encryption method, decryption method and relevant apparatus
EP2597883A1 (en) * 2011-11-22 2013-05-29 Nagravision S.A. Method, cryptographic system and security module for descrambling content packets of a digital transport stream
US8913543B2 (en) * 2012-03-01 2014-12-16 Telefonaktiebolaget L M Ericsson (Publ) Cooperative relaying and network coding in a cellular communications system
EP2717511A1 (en) 2012-10-05 2014-04-09 Nagravision S.A. Method and device for digital data blocks encryption and decryption
WO2014144930A2 (en) * 2013-03-15 2014-09-18 Videri Inc. Systems and methods for distributing, viewing, and controlling digital art and imaging
US9865222B2 (en) 2013-03-15 2018-01-09 Videri Inc. Systems and methods for displaying, distributing, viewing, and controlling digital art and imaging
WO2014182286A1 (en) * 2013-05-07 2014-11-13 Empire Technology Development, Llc Rapid data encryption and decryption
CN107547918A (en) * 2016-06-28 2018-01-05 中兴通讯股份有限公司 The methods, devices and systems that a kind of IPTV channel plays safely
CN106656472A (en) * 2016-12-27 2017-05-10 广州智慧城市发展研究院 Transaction data encryption method and system
CN108322778B (en) * 2018-02-09 2020-11-20 珠海迈科智能科技股份有限公司 Method and device for increasing scrambling speed of DVB data stream

Citations (3)

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US6028933A (en) * 1997-04-17 2000-02-22 Lucent Technologies Inc. Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network
US20040228401A1 (en) * 2003-05-12 2004-11-18 Chen Sherman (Xuemin) Method and system for protecting image data in frame buffers of video compression systems
US20040247126A1 (en) * 2003-06-04 2004-12-09 Mcclellan Stanley Archer Wireless network and methods for communicating in a wireless network

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US5345508A (en) * 1993-08-23 1994-09-06 Apple Computer, Inc. Method and apparatus for variable-overhead cached encryption
US5684876A (en) 1995-11-15 1997-11-04 Scientific-Atlanta, Inc. Apparatus and method for cipher stealing when encrypting MPEG transport packets
US6526144B2 (en) * 1997-06-02 2003-02-25 Texas Instruments Incorporated Data protection system
US7450717B1 (en) 1999-06-08 2008-11-11 General Instruments Corporation Self authentication ciphertext chaining
AU2001260970A1 (en) 2000-01-31 2001-08-07 Vdg Inc. Block encryption method and schemes for data confidentiality and integrity protection
US6986045B2 (en) * 2001-08-17 2006-01-10 Pitney Bowes Inc. Single algorithm cipher suite for messaging
FR2861234A1 (en) * 2003-10-17 2005-04-22 St Microelectronics Sa ENCRYPTION OF DATA IN AN ELECTRONIC APPARATUS WITH MULTIPLE SYMMETRIC PROCESSORS
WO2005064836A1 (en) * 2003-12-22 2005-07-14 America Online, Inc A system and method for using a streaming protocol
EP1610490A1 (en) * 2004-06-21 2005-12-28 France Telecom Method and apparatus for data encryption or decryption
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US20070255947A1 (en) 2005-02-09 2007-11-01 Choudhury Abhijit K Methods and systems for incremental crypto processing of fragmented packets
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Publication number Priority date Publication date Assignee Title
US6028933A (en) * 1997-04-17 2000-02-22 Lucent Technologies Inc. Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network
US20040228401A1 (en) * 2003-05-12 2004-11-18 Chen Sherman (Xuemin) Method and system for protecting image data in frame buffers of video compression systems
US20040247126A1 (en) * 2003-06-04 2004-12-09 Mcclellan Stanley Archer Wireless network and methods for communicating in a wireless network

Non-Patent Citations (1)

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Title
See also references of EP2076985A4 *

Also Published As

Publication number Publication date
WO2008052141A2 (en) 2008-05-02
US8345713B2 (en) 2013-01-01
CN101554004A (en) 2009-10-07
EP2076985A4 (en) 2011-02-23
US20080101414A1 (en) 2008-05-01
EP2076985A2 (en) 2009-07-08

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