Thomson Licensing

Thomson Multimedia S.a.

Interdigital Ce Patent Holdings

Interdigital Madison Patent Holdings

Yves Maetz

Marc Eluard

Eric Diehl

Franck Hiron

Nour-Eddine Tazine

Olivier Heen

Izabela Grasland

Ralf Schaefer

Niclas Stahl

Davide Alessio

Jino Nguyen

Alain Durand

Louis Chevallier

Charles Salmon-Legagneur

Mohamed Karroumi

Christophe Vincent

Sylvain Lelievre

Nicolas Prigent

Stéphane Onno

Yan-Mei Tang-Talpin

Jiang Shao

Michel Morvan

Gilles Desoblin

Within the context of the broadcasting of DVB services over an IP network, the trend is to separate the signalling information describing the network and the services offered from the services themselves. The signalling is made available to the terminals via XML files available on HTTP servers. In contrast to this approach, the invention consists of a method of recognition, by a receiver connected to a bidirectional network, of digital services on the bidirectional network, which comprises a step in which the receiver connects to a first stream, a step in which the receiver extracts from said stream information on the location on the network, on the one hand, of streams conveying the content of these services and, on the other hand, of separate streams conveying information describing these services, a step in which the receiver connects to at least some of the streams conveying service description information to obtain information on these services and a step in which the receiver uses this information to construct a list, possibly unitary, of the services available on the network.

Method of transmitting digital services over a network and device implementing the method

During log-on of a user to an entity protected by a password, the password is verified by iteratively receiving a password character; and verifying that the received character complies with a predefined property (&#x3b1;) that sets at least one requirement for allowable passwords. If this is not the case, then this can indicate a brute force attack and appropriate action may be taken. The property &#x3b1; may be dependent on the user. Also provided are a corresponding device and a computer program product.

Methods, devices and computer program supports for password generation and verification

A method for managing passwords for a user. A processor of an apparatus storing at least one received, incorrect password proposal receives via a user interface a further password proposal from a user; generates a hash value for the further password proposal; sends the hash value to the authentication server; receives from the authentication server a message indicative of whether the hash value corresponds to a correct password or to an incorrect password. In case the message indicates that the hash value corresponds to a correct password, the processor uses a distance function on each incorrect password proposal to obtain a distance value representative of a distance between the incorrect password proposal and the correct password; and sending to the authentication server hash values for password proposals for which the distance value is lower than or equal to a threshold value. Also provided are the apparatus and a computer program support. The disclosure can provide resistance to typing errors in the password proposals.

Apparatus and method for managing passwords

A method of executing a software application. A storage device stores connection data, an identifier of the software application, a context selector, and an application launcher. An execution device connects, using the connection data, to a server. The storage device transfers the context selector to the execution device, which executes it to generate a first context for the execution device. The identifier and the first context are sent to the server from which the storage device receives the software application, which is stored with the first context. The application launcher is transferred to the execution device for execution. A second context of the execution device is generated and the storage device checks if it matches the first context. If so, the storage device transfers the software application to the execution device where it is executed.

Method, system and device for execution of a software application

The graphical characteristics of 3D graphical objects encrypted using format-preserving encryption makes rendering of such objects quite inefficient by non-authorized devices. To optimize the rendering of a three-dimensional graphical object represented by a list of points and a list of surfaces defined by points in the list of points, a device receives the graphical object; encrypts the graphical object using a format-preserving encryption method to obtain an encrypted graphical object; encapsulates the encrypted graphical object to obtain an encapsulated graphical object by adding at least one encapsulation by adding for each encapsulation, to the list of surfaces, a plurality of surfaces that together enclose the encrypted graphical object and, in an embodiment, at least one point to the list of points; and outputs the encapsulated graphical object. Decryption is performed by essentially reversing the encryption.

Methods and devices for optimizing rendering of an encrypted 3D graphical object

A method of protecting a graphical object represented by a list of vertices and a list of surfaces, each surface being defined by a number N vertices. A device selects a surface S with N vertices; computes a new vertex d using a random or pseudo-random function; inserts the new vertex d into the list of vertices; creates N new surfaces S-SN from the surface S and the new vertex d; and replaces the selected surface S by the new surfaces S-SN in the list of surfaces. The device preferably iterates the method. The device may shuffle the list of vertices with the inserted vertices. Also provided is an unprotection method and corresponding devices and computer readable storage media.

Methods and devices for 3D object protection using surface subdivision

A method for acquisition of a software application stored on a software application distribution unit and intended to be supplied to a user computer unit is disclosed wherein, the user computer unit communicates an item of identification information identifying the software application to be acquired to an electronic security module connected to the user computer unit. The module generates, using a secret and identification information, an item of user information and transmits it with the identification information to the unit. The unit protects with the user information the software application identified by the identification information and the protected software application is transmitted to the user computer unit. Thus, the software application is protected with an item of information from the electronic security module of the user. The protected software application then has its protection removed on an electronic security unit equipped with an electronic security module.

Method for acquisition of software applications

There are times when a first user may wish to distribute an excerpt of a protected digital content to a second user, for example for criticism. The protected digital content is divided into a plurality of parts, each part being encrypted using a control word specific for the part, wherein each control word can be generated from a master control word for the protected digital content. A device belonging to the first user selects the parts of the excerpt; generates the control words for the selected parts from the master control word; generates a license for the selected parts, the license comprising the control words for the selected parts; and transmits the selected parts and the license to the receiver of the second user. Also provided is the device of the first user.

Method and device for excerpt licensing

A 3D object is protected by a first device that receives the 3D object, generates translation vectors that are added to the points of the 3D object to obtain a protected 3D object, and outputs the protected 3D object. The protected 3D object is unprotected by a second device by receiving the protected 3D object, generating translation vectors that are subtracted from the points of the protected 3D object to obtain an unprotected 3D object, and outputting the unprotected 3D object. Also provided are the first device, the second device and computer readable storage media.

Method and device for 3D object protection by transformation of its points

A device and a method for graphical passwords. A device displays an initial image comprising a plurality of graphical elements, each graphical element having at least two variants; receives user input to select a variant of a number of the graphical elements, thereby generating a modified image; and generates the secret value from at least the selected variants of the graphical elements. The graphical elements are advantageously seamlessly integrated in the images, thereby making the system resistant to shoulder surfing attacks.

Method and a device for generating a secret value

A rotation-activated electronic component, preferably a RFID tag mounted on or incorporated in a support that is rotated when read, e.g. a CD or DVD. The RFID tag comprises an antenna, a rotational switch, a component, advantageously a processor, and a time usage limiter. The antenna is adapted to transform received RFID signals to electric energy that powers the component and the rotational switch is adapted to cut the circuit unless the support does not rotate at or above a certain rotational speed. The time usage limiter counts down a timer when it is powered via the rotational switch and disables the RFID tag when the timer expires. Supports equipped with the RFID tag of the invention will thus respond until the timer expires, and preferably only if they rotate sufficiently.

Rotation-activated electronic component with time-limited use

A rotation-activated electronic component, preferably a RFID tag mounted on or incorporated in a support that is rotated when read, e.g. a CD or DVD. The RFID tag comprises an antenna, a rotational switch and a component, advantageously a processor. The antenna is adapted to transform received RFID signals to electric energy that powers the component. In a preferred embodiment, the rotational switch is adapted to cut the circuit unless the support does not rotate at or above a certain rotational speed. Supports equipped with the RFID tag of the invention will thus respond only if they rotate sufficiently. This can avoid collisions in case more than one such RFID tag is within communication range of an antenna of a reader. In a preferred embodiment, the information returned by the component is needed for full use of the content on the support.

Rotation-activated electronic component

The invention relates to a method for displaying audiovisual sequences, typically advertisements, carried out by a device provided with means for the reception and recording of said sequences. A display scenario is sent to the device. Said scenario comprises groups of data made up of sequence identifiers and at least one time display window. Following the reception of a signal which typically announces an advertising spot, the device selects a sequence whose associated time display window includes the present moment and displays it. Usual behavior of the user is stored by the device which plans the display of said sequences when the user is not normally present during the planned time window. In an advanced form, the time window is broken down into periods and the scenario specifies a number of displays of the sequence during said period. The invention also relates to a device which can receive a scenario and run it in order to select sequences and display them according to the display method.

Method for displaying audiovisual sequences at receiver level and receiver for displaying said sequences

A method for secure installation of software applications. The user receives the software, partly encrypted, and an installation token for a number of licenses from the software provider, plugs the software and the installation token into a computer, and launches the installation application. A Secure Authenticated Channel is established between the installation application and the installation token and a unique identifier of the computer is sent thereon to the installation token. The installation token verifies that there are remaining licenses, decreases the remaining licenses, authorizes the installation and sends the decryption key and a certificate/key pair to the installation application that decrypts and installs the software, preferably linking the installation to the computer's identifier. A variant allows (virtually) unlimited installations of time limited programs that are transformed into time unlimited programs once the installation token has reported the number to the software provider and paid for the necessary licenses. Also provided is the installation token.

Methods and a device for secure software installation

A method for activating several applications, where a received start up application determines whether a first application or a second application will be activated. The first application, which is received, along with the start up application, is activated if a file of additional data is not present in a memory. Conversely, the second application will be activated if the file is present in the memory.

Growing community of inventors

Melesse, France

Yves Maetz