公开(公告)号：EP2668746A1

公开(公告)日：2013-12-04

申请号：EP12701344.9

申请日：2012-01-23

申请人： Viaccess

发明人： MAGIS, Erwann

IPC分类号： H04L12/28 ,  H04L29/08

CPC分类号： H04N21/43615 ,  H04L12/2812 ,  H04L41/30

摘要： A method for accessing multimedia contents within a household via a network includes causing a master to build a contents log associating each content with a server, seeking a multimedia content in the log, and setting up a unicast channel between the client and a server associated with the contents sought in the log, causing the client to receive, using the channel, the content, and to play back the content, in response to connection of a new client or server to the home network or disconnection of a master from the home network, causing different apparatuses capable of functioning as a referencing server to exchange criteria for electing an apparatus to function as a referencing server, and based on the criteria, electing a new master from among the apparatuses capable of fulfilling the referencing server function, wherein in response to election, the new master functions as a reference server.

公开(公告)号：EP2659613A1

公开(公告)日：2013-11-06

申请号：EP11802707.7

申请日：2011-12-16

申请人： Viaccess

发明人： HAMON, Vincent ,  DUBROEUCQ, Gilles

IPC分类号： H04L9/08

CPC分类号： H04L63/0428 ,  H04L9/088 ,  H04L2209/56 ,  H04L2209/60

摘要： The invention relates to a method of transmitting and receiving a multimedia content scrabbled with the aid of a control word CW
t comprising: - the encryption (216) of the control word CW
t with the aid of a mother virtual card so as to obtain a cryptogram CW*
t , - the generation (220) of a message ECM incorporating the cryptogram CW*
t , - the decryption of the cryptogram with the aid of a daughter virtual card associated with the mother virtual card, - the changing of the minimum every two hours, by the sender, of a mother virtual card used to obtain the cryptogram CW*
t+n of a following cryptoperiod CP
t+n of the same multimedia content, the new mother virtual card used differing from the previous mother virtual card used by its utilization key and at least the executable code of its encryption algorithm or of the syntactic constructor - in response, the selection by the terminal of a new daughter virtual card to be used to decrypt the cryptogram CW*
t+n .

摘要翻译： 一种用于发送和接收具有由控制字加扰的密码周期的多媒体内容的方法，包括使用第一虚拟母卡中的操作密钥和加密算法的发送者，以使用第一个虚拟母卡中的语法构造器来加密控制字以获得密码 虚拟母卡生成包含密码的ECM，并将其发送到终端。 终端接收ECM并使用包含在与母卡相关联的第一虚拟子卡中的语法分析器，并使用它来定位ECM中的密码CW * t的位置。 在子卡中使用解密算法的操作密钥，然后解密密码。 然后，使用解密的控制字，进行解密加密周期。 同时，发送者偶尔将虚拟母卡更改为不同的虚拟母卡。

公开(公告)号：EP2517452B1

公开(公告)日：2013-11-06

申请号：EP10812872.9

申请日：2010-12-21

申请人： Viaccess

发明人： PRESTY, Renaud ,  GRANET, Olivier

IPC分类号： H04N5/00 ,  H04N7/16 ,  G06F9/445 ,  G06F21/00 ,  H04H60/23 ,  H04N21/418 ,  H04N21/4623 ,  H04N21/262 ,  H04N21/458 ,  H04N21/6543 ,  H04N21/845

CPC分类号： H04N7/16 ,  G06F21/572 ,  H04H20/91 ,  H04H60/15 ,  H04H60/23 ,  H04N21/26291 ,  H04N21/4181 ,  H04N21/4586 ,  H04N21/4623 ,  H04N21/6543 ,  H04N21/8166 ,  H04N21/8456

公开(公告)号：EP2596450A2

公开(公告)日：2013-05-29

申请号：EP11733872.3

申请日：2011-07-19

申请人： Viaccess

发明人： NEAU, Louis

IPC分类号： G06F21/00 ,  H04N7/167

CPC分类号： H04L9/08 ,  G06F21/10 ,  H04N21/2347 ,  H04N21/26613 ,  H04N21/4405

摘要： The invention relates to a method of protecting a content to be distributed to a pool of receiving terminals connected to a content distribution network and each having a specific level of security dependent on the technical security means used, method comprising the following steps: at the sending end, - generating a scrambling key for said content, - transforming said scrambling key by a first calculation module 26 arranged at the head of said content distribution network, - scrambling the content by the transformed key, - transmitting the scrambled content and the scrambling key to the terminals, and, - on receipt of said content and the scrambling key by a terminal, - transforming said scrambling key by a second calculation module arranged in said terminal, - descrambling the content with the transformed scrambling key, method characterized moreover by the steps consisting in, at the sending end, - applying to said scrambling key, by means of said first calculation module, a function F defined as a function of said specific security level, and on receipt, - applying to said scrambling key, by means of said second calculation module, a function F defined as a function of said specific security level.

公开(公告)号：EP2586198A1

公开(公告)日：2013-05-01

申请号：EP11725786.5

申请日：2011-06-20

申请人： Viaccess

发明人： POCHON, Nicolas ,  CHIEZE, Quentin ,  LAFRANCHI, Stéphane

IPC分类号： H04N7/167 ,  H04L29/06

CPC分类号： H04L9/088 ,  H04L63/0485 ,  H04L2209/603 ,  H04L2463/061 ,  H04L2463/101 ,  H04N21/4405 ,  H04N21/4623 ,  H04N21/835

摘要： The invention relates to a method for protecting the transmission of multimedia content or of a check word between a security processor and a terminal, including: the prior recording of a plurality of secret codes C
i
-1 in the terminal, enabling the decryption of the multimedia content or of the encrypted check word by means of a respective session key SK
i obtained by diversifying a root key SK_root with a parameter P
i , one of said parameters P
i being a parameter P
c ; the reception (122) of the parameter P
c by the terminal in a message which also contains multimedia content or a check word to be decrypted by the security processor; and the selection (132) by the terminal, from among all of the recorded secret codes, of the secret code C
c
-1 to be used, depending on the parameter P
c or on another parameter contained in the same message.

公开(公告)号：EP2521984A1

公开(公告)日：2012-11-14

申请号：EP10800964.8

申请日：2010-12-31

申请人： Viaccess

发明人： NEAU, Louis

IPC分类号： G06F21/00 ,  H04L9/12 ,  H04L9/08

CPC分类号： H04L9/12 ,  G06F21/10 ,  H04L9/0822

摘要： The invention relates to a method for protecting content (6) scrambled by a content key (CW) transmitted in an encrypted form using a content-access key (K), said content being provided by a transmission system to at least one reception terminal (4) using a locally configured service at said reception terminal according to a set of properties Pi, where i = 1 to N, known by the transmission system, each of said properties Pi being represented by a piece of data X
i stored in said transmission system and by a local piece of data Y1 that is read-accessible by said terminal, characterized in that it comprises upon transmission a step of over-encrypting said content key CW using at least one reversible over-encrypting function f
i (X
i ) that is dependent on at least one of the properties Pi, where i = 1 to n.

摘要翻译： 本发明涉及一种用于保护由内容密钥（CW）加密的内容（6）的方法，所述内容密钥（CW）使用内容访问密钥（K）以加密形式发送，所述内容由传输系统提供给至少一个接收终端 4）根据传输系统已知的一组属性Pi，其中i = 1至N，在所述接收终端处使用本地配置的服务，每个所述属性Pi由存储在所述传输系统中的一条数据Xi表示 以及由所述终端可读访问的本地数据片段Y1，其特征在于，其包括在发送时使用至少一个依赖的可逆过加密函数fi（Xi）对所述内容密钥CW进行过度加密的步骤 对于属性Pi中的至少一个，其中i = 1至n。

公开(公告)号：EP2520042A1

公开(公告)日：2012-11-07

申请号：EP10795709.4

申请日：2010-12-20

申请人： Viaccess

发明人： MAGIS, Erwann

IPC分类号： H04L9/08

CPC分类号： H04L9/083 ,  G06F21/10 ,  H04L9/088 ,  H04L2209/601 ,  H04N21/4623 ,  H04N21/63345

摘要： A method for deciphering control words for mechanically and electronically independent terminals includes causing first and second terminals to transmit a first and second cryptograms to a control-word server, causing that server to decipher them to obtain first and second control words for enabling descrambling of first and second multimedia content broadcast simultaneously on respective first and second channels, causing the server to transmit the control word to the respective terminals, the second control word obtained by deciphering the second cryptogram before the first terminal executes a channel change, and in response to the channel change, causing the first terminal to search to determine whether the second control word has already been transmitted in advance by the server before the channel change, and if the control word has been transmitted in advance, causing the first terminal to immediately start descrambling the second multimedia content with the second control word.

摘要翻译： 一种用于解密的控制字用于机械和电子独立终端方法包括使第一和第二端子以发送第一和第二密文的控制密码服务器，导致没有服务器解密它们，以获得第一和第二控制字用于使第一解扰 和第二多媒体内容同时广播上respectivement第一和第二通道，使所述服务器中的控制字发送到respectivement端子，由所述第一终端之前解密所述第二密码获得的第二控制字执行信道改变，并且响应于所述 渠道变革，使得第一终端进行搜索，以确定矿山是否第二控制字已经被反式渠道变革之前由服务器预先mitted，如果控制字已经提前反式mitted，使得第一终端立即启动解扰 第二多媒体内容与第二控制字。

公开(公告)号：EP2356608B1

公开(公告)日：2012-08-01

申请号：EP09749130.2

申请日：2009-11-12

申请人： Viaccess

发明人： GADACHA, Haythem

IPC分类号： G06F21/00

CPC分类号： G06F21/10 ,  G06F21/552

摘要： The method of the invention comprises: a) determining (64, 68) at least one limit based on N already received identifiers, where N is strictly higher than the number of identifiers that can be contained in an anti-replay memory, the limit being determined so as to define, on the one hand, a range of identifiers that have not yet been received and, on the other hand, a range of identifiers containing the N already received identifiers; b) comparing (58) the newly received identifier to said limit; c) if the newly received identifier belongs to the range identifiers that have not yet been received, diagnosing (60) a first reception of the newly received identifier; and d) if the newly received identifier belongs to the range of identifiers containing the N already received identifiers, searching (73) the newly received identifier among those contained in the anti-replay memory.

公开(公告)号：EP1470712B1

公开(公告)日：2012-07-11

申请号：EP03743908.0

申请日：2003-01-21

申请人： Viaccess

发明人： VIGARIE, Jean-Pierre ,  BECKER, Claudia ,  CODET, André ,  FEVRIER, Pierre ,  GUIONNET, Chantal

IPC分类号： H04N21/6543 ,  H04N21/266

CPC分类号： H04N21/6543 ,  H04N7/163 ,  H04N7/17345 ,  H04N21/266 ,  H04N2005/91364

摘要： The invention relates to a remote control protocol for a local action to generate a command message (OM), which permits a broadcaster to control a local action in at least one receiving station comprising: a step for transmission of an authorisation message (HM) from the broadcaster to the receiving station(s) and a verification step (4) in said receiving station(s), for transmitted authenticity parameters and addresses, with regard to parameters memorised in each of said receiving stations. The invention is characterised in that the authorisation message (HM) comprises a generation action (CM), at the level of the receiving station(s), a command message (OM), calculated locally and said protocol also comprises, conditional on the verification step (4), an interpretation step (10) of said action (CM) transmitted with said authorisation message (HM) and a local generation step (20) for a command message (OM) in response to said interpretation step (10). The above finds application particularly in transmission of encoded television information (I*).

公开(公告)号：EP1762096B1

公开(公告)日：2012-03-14

申请号：EP05781819.7

申请日：2005-06-27

申请人： Viaccess

发明人： BEUN, Frédéric ,  BOUDIER, Laurence

IPC分类号： H04N21/418

CPC分类号： H04N21/4623 ,  H04N21/4181 ,  H04N21/44236

摘要： A remote control method enabling a user to control the operation of a receiving unit in a digital data distribution network. The method comprises the steps of (a) defining a set of remotely actuatable tests in said receiving unit, such that the respective results of said tests enable at least one special use of at least one portion of the receiving unit to be identified; (b) defining a set of actions executable in said receiving unit, which actions are intended to control the operation of said unit; (c) combining at least one action defined in step (b) with each of the tests defined in step (a); and (d) remotely actuating at least one test among the tests defined in step (a).