Nagravision S.a.

Nagracard S.a.

Nagrastar LLC

Henri Kudelski

Bertrand Wendling

Alain Delpuch

Pierre Sarda

Fabien Gremaud

Nicolas Fischer

Olivier Brique

Guy Moreillon

Rached Ksontini

Jimmy Cochard

Corinne Le Buhan

Marco Macchetti

Frederic Thomas

Marco Sasselli

Gregory Duval

Joel Conus

Christophe Gogniat

Joël M Conus

Philippe Desarzens

Christian Wirz

Sebastien Robyr

Frédéric Thomas

Xavier Carrel

Luca Gradassi

Patrick Hauert

Serge Gaumain

Cédric Groux

Joël Conus

Nicolas Fisher

Sébastien Robyr

Gregory Duvai

A method to identify the origin of a security module in a pay-tv system comprising: receiving by the pay-tv decoder system at least a first stream, a second stream and a control word stream, the first and second streams being encrypted by a first and a second control word, respectively, extracting from the control word stream, entitlement messages containing a main control word allowing retrieval of the first and second control words and access conditions, transferring the control word stream to the security module and checking the access conditions, selecting a current control word from the first or second control word based on part of the internal parameter, transmitting the current control word to the pay-tv decoder, selecting a current stream from the first or second stream in accordance with the selection of the first or second control word, and decrypting the current stream with the current control word.

Method to identify the origin of a security module in pay-TV decoder system

A physical device, the possession of which may provide access to digital media content in a fashion similar to the possession of a DVD providing access to the media content stored thereupon on a suitable DVD player. The possession of the physical device grants access to digital content stored on a remote server using a suitable device such as e.g., a set-top box or media player having Internet connectivity. The physical device provides for convenient and possibly anonymous access to content stored on a remote server and has certain advantages over known techniques for storing rights to access the content.

Electronic support allowing access to remote audio/video assets

A method and device for controlling access to a specific type of services among a plurality of type of services proposed by a service supplier. The method includes entering, into an authentication device of the user, a personal identification code specific to the user, the personal identification code being identical for at least two different types of services proposed by the service supplier; and indicating, by said user, said specific type of services for which the access is required, the indication being made in the authentication device. The method further comprises transforming said personal identification code, in a way depending on a cryptographic function specific to said user and to said required specific type of services, the cryptographic function being memorized in the authentication device; transmitting the result of the transformation of said personal identification code to the service supplier; authenticating the user by the service supplier by means of the transmitted result of said transformation, and assigning an access right according to the result of the authentication. The device implements the record.

Method for controlling the access to a specific type of services and authentication device for controlling the access to such type of services

A system for a local network, the system being configured to extend a near field communication (NFC) between an NFC device and an NFC mobile device beyond the range defined by the NFC standards.

Near field communication system in a local network

This invention relates to a process for carrying out a transaction between a payment module and a security module connected to a user's unit, this process being characterized in that it comprises the following steps: entering an identifier representative of the transaction to be carried out by means of an input device; generating by the user's unit, a control message containing at least a representative code of said transaction and an identifier of the security module requiring the transaction; sending said control message to said payment module (PP); verifying in said payment module whether it is entitled to carry out the desired transaction; if the payment module is entitled to carry out this transaction, execution of the transaction, storage of the result of the transaction in said payment module and generation by the payment module, of a receipt relating to the desired transaction and to the related security module; sending said receipt to a management center; sending an unlocking code to the security module (SC) by the management center; registering the transaction in said security module.

Process for carrying out a transaction between a payment module and a security module

Systems and methods for performing cascading dynamic crypto periods are disclosed. In embodiments, a control word and a set of functions is transmitted between a head-end and recipient devices at the beginning of a crypto period. The crypto period is divided into a discrete number of sub-crypto periods. The control word used to encrypt and decrypt the broadcast content is changed during each sub-crypto period. At the end of the first sub-crypto period, a derived control word is generated by passing the original control word to a function in the set of functions in order to generate a derived control word at the first transition between sub-crypto periods. The derived control word is used for encryption and decryption of the broadcasted content during the second sub-crypto period. Upon transitioning to the third sub-control-period, the derived control word is input into another function to produce a second derived control word.

Cascading dynamic crypto periods

The present invention provides a solution to the problem of guaranteeing the integrity of software programs by encrypting all or part of each instruction of a program using a key based on all or part of one or a plurality of previous instructions, thus resulting in a different encryption key per instruction. The invention is applicable to software programs whose structures are not necessarily tree-like in nature and is also applicable when the program includes loops, jumps, calls or breaks etc. The invention allows for an exception to be flagged when an encrypted instruction is wrongly decrypted. There is no need for the first instruction to be in clear, since the instruction key may be appropriately initialized as required. The invention can be realized in software or entirely in hardware thereby eliminating the possibility of a third party intercepting a decrypted instruction or a decryption key.

Processor-implemented method for ensuring software integrity

The aim of the present invention is to limit the impact of security breaches, which are the emulators of the security module. This aim is reached by a processing unit of audio/video digital conditional access data, encrypted by control words, responsible for processing security messages containing at least one cryptogram relative to a control word and one instruction relative to the control word, characterized in that it includes means to receive at least two micro programs by security messages, executable by the security module, said security module comprising means to store at least two micro programs and means to receive an instruction contained in the security message, for selecting the micro program indicated by the instruction, for executing the said micro program with at least the cryptogram as a parameter of execution, this execution allowing the calculation of the control word to be sent back to the audio/video processing unit.

Security module for audio/video data processing unit

A method for updating, in the background, data stored in physical memories without affecting the current operations performed by the microprocessor. When the update is completely terminated, the application switches from an old version to a new version. This switching occurs by a reconfiguration of the page table during which a first sub-tree structure of pointers accessing the old version of data stored in memories is replaced by a second sub-tree structure of pointers thus allowing access to the new version of data. This update method prevents incoherent transitory states of the system as the latter works with the previous data version until the installation of the new version becomes usable. In the case of an interruption to the update process, the application can always reinitialize the update since the old version of data can be reactivated by returning to the previous configuration of the page table.

Method for updating data in memories using a memory management unit

A method allows a broadcasted conditional access content accessible at the time of transmission to be also accessible at a later time thanks to intermediate storage on a hard disk of a user unit. The processing method includes the steps of receiving at the user unit a data stream encrypted by at least one control word, at least one control message stream containing the control words, forming an index file, each index comprising an identifier of a control message formed by the extraction of data associated to the control messages and an identifier of the part of the content to which the control message is applied; and, at the time of the deferred processing of the content, extracting at least one part of the control messages and resynchronizing the content with the control messages by the use of the index file, the identifier of the control message allowing the selection of the current control message from a set of control messages at the time of the exploitation of the content identified by the identifier of the part of the content related to this control message.

Method for processing conditional access contents by a user unit

A method for updating the firmware of a security module allowing it to 'jump' towards a dedicated separate patch message stream thanks to a trigger messages stream broadcasted in a main stream of management messages. The trigger messages comprise version information allowing establishing whether the security module is up-to-date, and an identifier indicating to the security module the suitable patch stream. If the current version of the firmware of the security module is inferior to the patch version, the security module is directed towards the stream of patch messages designated by the identifier included in the trigger messages. Once the update of the firmware is complete, the security module is again directed towards the main stream. This return can be carried out automatically, namely with a switch message comprising an identifier of the first stream.

Method for updating the firmware of a security module

A system and a method are disclosed for enforcing a predetermined mapping of addresses in a physical address space to addresses in a virtual address space in a data processing system including a processor in the virtual address space and a memory in a physical address space. During the compilation and linking of an application to be run on the data processing system, in at least one embodiment, the mapping table is generated linking the virtual addresses to physical addresses. This mapping table is kept secret. A second mapping table is generated using a cryptographic function of the physical address with the virtual address as a key to link virtual addresses to intermediate addresses. The second mapping table is loaded into the memory management unit. The data processing system further includes cryptographic hardware to convert the intermediate address to the physical address using the inverse of the cryptographic function which was used to calculate the intermediate address.

Method and apparatus for enforcing a predetermined memory mapping

This invention relates to a method for the transmission of management data to at least one multimedia unit or a group of multimedia units. This method is characterized in that said management data is sent in the form of at least one authorization message encrypted by means of at least one synchronization key (SK), the sending of said at least one authorization message being repeated cyclically and intended for said multimedia unit or said group of multimedia units, and in that the synchronization key is modified at least during each cycle.

Growing community of inventors

Chexbres, Switzerland

Henri Kudelski