EP1314314A2 - Procede pour adresser des terminaux - Google Patents

Procede pour adresser des terminaux

Info

Publication number
EP1314314A2
EP1314314A2 EP01969353A EP01969353A EP1314314A2 EP 1314314 A2 EP1314314 A2 EP 1314314A2 EP 01969353 A EP01969353 A EP 01969353A EP 01969353 A EP01969353 A EP 01969353A EP 1314314 A2 EP1314314 A2 EP 1314314A2
Authority
EP
European Patent Office
Prior art keywords
group
binary
terminals
terminal
vector
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.)
Withdrawn
Application number
EP01969353A
Other languages
German (de)
English (en)
Inventor
Jörg Schwenk
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.)
Deutsche Telekom AG
Original Assignee
Deutsche Telekom AG
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 Deutsche Telekom AG filed Critical Deutsche Telekom AG
Publication of EP1314314A2 publication Critical patent/EP1314314A2/fr
Withdrawn legal-status Critical Current

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
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • 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
    • 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
    • H04N21/4508—Management of client data or end-user data
    • H04N21/4516—Management of client data or end-user data involving client characteristics, e.g. Set-Top-Box type, software version or amount of memory available
    • 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
    • H04N21/454—Content or additional data filtering, e.g. blocking advertisements
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6402—Address allocation for clients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/70—Aspects of broadcast communication characterised in that receivers can be addressed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming

Definitions

  • the invention relates to a method for addressing terminals for receiving television programs that are subject to a fee, the terminals being divided into groups each having a group address, and each of the terminals being assigned to an identifier within the group.
  • Terminals for receiving the fee-based programs are known as so-called set-top boxes or decoders. However, other end devices are also possible, such as PC cards or PCMCIA modules. Suitable terminals can also be integrated in the television receiver.
  • Chip cards are usually used as security modules, which are not permanently connected to the end device, but can also be removed from it. This allows one and that the same end device can be used by different users with an individual security module. In connection with the present invention, however, the terminal device itself is considered as the terminal device together with the security module that is used in each case.
  • DVB digital video broadcasting
  • other algorithms have also become known.
  • ECM Entitlement Control Messages
  • EMM Entitlement Management Messages
  • ADSL terrestrial broadcasting
  • EMMs can be addressed to individual customers or to groups of customers.
  • EMMs usually contain an SK service key in encrypted form. This service key is required to encrypt the control words in the ECMs undo.
  • EMMs can - if necessary partially - be encrypted or unencrypted, but are protected against manipulation with a cryptographic checksum (MAC).
  • MAC cryptographic checksum
  • Each group is given a group address and each customer is assigned an identifier by a position within the group. This position is given to the group address as a bitmap of size 256. If bit i in the bitmap is set to 1, this means that the EMM affects the customer who occupies position i in the group. A 0 means that the EMM does not affect the terminal with the respective position. Any subsets 1 to 256 of the group can thus be addressed.
  • the object of the present invention is to make the addressing of the end devices more secure.
  • the computing effort, in particular in the terminal or in the security module, should be as low as possible, since there may be a large number of incoming EMMs to be checked there.
  • This object is achieved in that the identifier is a binary vector, that the group address and a data word are sent to address terminals of a group and that the data word is formed by logically combining the binary vectors with a further binary vector, which describes, which of the group's end devices are to be addressed.
  • the linkage is carried out by forming a binary matrix from the binary vectors and by multiplying the binary matrix by the further vector. It is preferably provided that the further binary vector contains a binary position for each terminal in the group, which is set to a predetermined value when the terminal is to be addressed.
  • the data word according to the invention is preferably evaluated in that the
  • Terminal stored binary vector assigned to the terminal is multiplied by the transmitted data word and that the addressing is considered to have been made if this multiplication results in a predetermined binary value.
  • 1 is a flow chart to illustrate the method steps carried out by the transmitter, 2 shows a flowchart to explain the method steps on the terminal side;
  • Fig. 4 shows the formation of the data word to be transmitted
  • Fig. 5 the evaluation of the transmitted data word.
  • FIGS. 1 and 2 represent parts of programs which run on the transmitter side and in the security module or terminal, insofar as they relate to the method according to the invention.
  • the vector u is read in, which indicates to which end devices an EMM is to be sent.
  • the vector u read represents a one-line matrix which is transformed into the matrix u at 2.
  • step 3 a matrix is read in, the rows of which each represent a binary vector of length k assigned to a terminal. Multiplying the inverted matrix A -1 by the matrix uT results in the data word x to be transmitted. This is added to 4 of the EMM to be transmitted. At 5, the EMM including the data word x is transmitted to the end devices via the respective medium. The program is then ended at 6 or repeated for addressing further end devices.
  • an EMM is recognized in the incoming data stream in the terminal and from this the data word is identified at 9 x separated.
  • the data word x is then multiplied by the stored individual vector vi of the terminal i.
  • the binary vectors v to v 5 of five terminals each form a row of a matrix A. This matrix is inverted and as
  • the matrix A -1 according to FIG. 4 is multiplied by the matrix uT, which means that the first, the second and the fifth terminal of this group are to be addressed. Multiplication creates another matrix x, which is added to the EMM as a data word.
  • FIG. 5 shows the test of the data word in the receiver using the same numerical example for the receiver whose binary vector is vj_. This vector stored in the security module is multiplied by the matrix x, which results in a 1 in the example shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un procédé permettant d'adresser des terminaux pour recevoir des programmes de télévision payants. Les terminaux sont répartis en groupes comportant chacun une adresse de groupe et un code d'identification est alloué à chacun des terminaux de chaque groupe. Le code d'identification est un vecteur binaire. Pour adresser des terminaux d'un groupe, l'adresse du groupe et un mot de données sont envoyés. Le mot de données est formé par combinaison logique des vecteurs binaires avec un autre vecteur binaire qui décrit les terminaux du groupe qui doivent être adressés. La combinaison intervient de préférence par formation d'une matrice binaire comprenant les vecteurs binaires existants et par multiplication de la matrice binaire avec l'autre vecteur.
EP01969353A 2000-08-02 2001-07-09 Procede pour adresser des terminaux Withdrawn EP1314314A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10037630 2000-08-02
DE10037630A DE10037630B4 (de) 2000-08-02 2000-08-02 Verfahren zur Adressierung von Endgeräten
PCT/EP2001/007853 WO2002011323A2 (fr) 2000-08-02 2001-07-09 Procede pour adresser des terminaux

Publications (1)

Publication Number Publication Date
EP1314314A2 true EP1314314A2 (fr) 2003-05-28

Family

ID=7651063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01969353A Withdrawn EP1314314A2 (fr) 2000-08-02 2001-07-09 Procede pour adresser des terminaux

Country Status (5)

Country Link
US (1) US7164766B2 (fr)
EP (1) EP1314314A2 (fr)
AU (1) AU2001289632A1 (fr)
DE (1) DE10037630B4 (fr)
WO (1) WO2002011323A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1545130A1 (fr) * 2003-12-16 2005-06-22 Nagravision S.A. Procédé de mise à jour de droits d'accès à des données à accès conditionel
CN100525434C (zh) * 2005-12-31 2009-08-05 华为技术有限公司 一种在数字电视条件接收系统中对用户授权的方法
US20090165074A1 (en) * 2007-12-21 2009-06-25 General Instrument Corporation Multi-Address Message Addressing
EP2334069A1 (fr) * 2009-12-11 2011-06-15 Irdeto Access B.V. Fourniture de mots de commande à un récepteur
US10250514B2 (en) 2014-02-06 2019-04-02 Quiet Coach Inc. Systems, methods, and devices for addressed data communications

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE500950C2 (sv) * 1993-02-18 1994-10-03 Info Dev & Patent Ab Förfarande vid informationsöverföring samt anordning för genomförande av förfarandet
US5539822A (en) * 1994-04-19 1996-07-23 Scientific-Atlanta, Inc. System and method for subscriber interactivity in a television system
US5657470A (en) * 1994-11-09 1997-08-12 Ybm Technologies, Inc. Personal computer hard disk protection system
JPH096706A (ja) * 1995-06-22 1997-01-10 Hitachi Ltd 疎結合計算機システム
US6052781A (en) * 1997-02-21 2000-04-18 Savvy Frontiers Property Trust Multiple user computer including anti-concurrent user-class based disjunctive separation of plural hard drive operation
ZA973614B (en) * 1997-03-21 1998-03-23 Canal Plus Sa Broadcast and reception system, and receiver/decoder and remote controller thereof.
AU741114B2 (en) 1997-03-21 2001-11-22 Nagra France Sas Smartcard for use with a receiver of encrypted broadcast signals, and receiver
ID23380A (id) 1997-03-21 2000-04-20 Canal & Siciete Anonyme Metode dan aparatus untuk mencegah akses yang curang dalam sistem akses bersyarat
US7515712B2 (en) * 1997-08-01 2009-04-07 Cisco Technology, Inc. Mechanism and apparatus for encapsulation of entitlement authorization in conditional access system
FR2769779B1 (fr) * 1997-10-14 1999-11-12 Thomson Multimedia Sa Procede de controle d'acces a un reseau domestique et dispositif mettant en oeuvre le procede
EP0996265B1 (fr) * 1998-10-21 2006-04-19 Alcatel Système et méthode pour l'éxécution d'une commande définie, entre un premier et un deuxième terminal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0211323A2 *

Also Published As

Publication number Publication date
AU2001289632A1 (en) 2002-02-13
DE10037630B4 (de) 2008-02-07
US7164766B2 (en) 2007-01-16
WO2002011323A3 (fr) 2003-03-13
DE10037630A1 (de) 2002-03-28
US20030128846A1 (en) 2003-07-10
WO2002011323A2 (fr) 2002-02-07

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