Thomson Licensing

Interdigital Ce Patent Holdings

Marc Eluard

Yves Maetz

Eric Diehl

Olivier Heen

Niclas Stahl

Davide Alessio

Marc Joye

Sylvain Lelievre

Christophe Vincent

Antoine Monsifrot

Nicolas Prigent

Jean-Marc Boucqueau

Gilles Desoblin

A method for displaying a content from 4D light field data is described. Such method is executed by an electronic device, and is remarkable in that it comprises changing point of view of the content and/or a focus plane associated with the content, according to viewing rights.

Method for displaying a content from 4D light field data

An asset, which is a graphical 3D object, is protected at a processor of an encryption device that obtains the asset and a proxy including polyhedrons, processes points of the asset to obtain transformed points lying within the polyhedrons of the proxy, and outputs a protected asset including the transformed points. A decryption device including a processor decrypts the protected asset by obtaining the transformed points of the protected asset, processing transformed points using a reverse of the transformation to obtain reconstructed points of the asset, and obtaining a reconstructed asset using the reconstructed points.

Devices and methods for encryption and decryption of graphical 3D objects

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

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

A cartridge preferably for use with a game console. The cartridge comprises a ROM, a non-volatile memory, a processor and an encryption unit. An application running on the console may read data from the ROM, read data from the non-volatile memory, and write data in the non-volatile memory. Data to be written in the non-volatile memory is encrypted by the encryption unit, but data to be read is returned in encrypted form for decryption by a decryption function of the game application. Data may also be received encrypted to be decrypted and returned. The encryption or decryption unit may also receive data from the non-volatile memory and send it to the interface. The invention improves on the prior art copy protection as a hacker must reverse engineer the game application in order to copy it, if the encryption unit is unknown. The invention also provides an optical medium equipped with a RFID circuit.

Growing community of inventors

Acigne, France

Marc Eluard