Thomson Licensing

Interdigital Ce Patent Holdings

Interdigital Ce Patent Holdings, Sas

Olivier Heen

Christoph Neumann

Stephane Onno

Nicolas Prigent

Olivier Courtay

Eric Diehl

Alain Durand

Yves Maetz

Marc Eluard

Jean-Pierre Andreaux

Yan-Mei Tang-Talpin

Siegfried Loeffler

Jean-Ronan Vigouroux

Nicolas Le Scouarnec

Charles Salmon-Legagneur

Mohamed Karroumi

Antoine Monsifrot

Frederic Lefebvre

Stéphane Onno

Niclas Stahl

Erwan Le Merrer

Yan-Mei Tang Talpin

Clementine Maurice

Christophe Bidan

Christophe Neumann

Eiwan Le Merrer

The invention relates to a method for controlling access to a first network, comprising receiving, by a first network access device of the first network, an access request from a visiting user device, determining, by the first network access device, if the visiting user device was granted an access to the first network, if the visiting device has not been granted an access to the first network, determining if there is a second network access device that granted the visiting user device an access to a second network and the second network access device is linked to the first network access device, and if the second network access device exists, granting the visiting user device an access to the first network by the first network access device.

Methods, apparatus, and system for controlling access to a local network

In an Internet interface device such as a gateway managing a local network, a processor obtains a packet received from a device via a local network interface. The processor can determine whether or not the packet originates from a device in the local network deemed to be part of a particular group. The processor can also determine if the packet is addressed to an internet domain for which it stores identifying information in memory. In this case, the processor inspects the packet in search of a cookie. In case no cookie is found, the packet is output as is; if a cookie is found, the processor modifies cookie information in the packet by inserting a cookie specific to the Internet interface device, which results in a modified packet that then is output through the internet interface. Using the original cookie and the added cookie, it is possible to link cookies sent from different devices in the local network.

Device and method for data packet processing

An access point receives from a client a first nonce and a first cryptographic hash for the first nonce, the first cryptographic hash calculated using a first key derived from a second key, the second key input on the client or derived from a passphrase input on the client, derives first keys from each of a stored primary input and at least one stored secondary input valid at the deriving, the stored primary input and the at least one stored secondary input each being one of a second key and a passphrase, verifies the cryptographic hash using each derived first key to find a derived first key that checks the first cryptographic hash, generates a third key and a second cryptographic hash using the derived first key that checks the first cryptographic hash, and sends the third key and the second cryptographic hash to the client.

Devices and methods for client device authentication

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

A TCP handshake is distributed by having an initiator device send, to a server SYN(m) with the IP address of a terminator device as source address. The initiator device can then forget any TCP state for the SYN(m). The server responds with a SYN-ACK(m+1, n) according to the normal TCP handshake, but the response goes to the terminator device that receives the message, reconstructs the TCP handshake as if it had sent the initial SYN message, and sends an ACK(n+1) to the server. The TCP handshake method can be used to avoid allocation of resources in for example device monitoring.

Devices and methods for performing TCP handshakes

Rendering second screen information on a second screen device. A user device receives information characterizing the source of a content data stream and the content data stream; generates a watermark payload using a plurality of parameters comprising the information and a time of the user device; and inserts a watermark comprising the watermark payload into the content data stream that is rendered. The second screen device captures the watermark and extracts the watermark payload and then at least one of the plurality of parameters; generates, using the at least one extracted parameter, a request that is sent the request to a server; receives information from the server in response to the request; and displays the received information on a screen of the second screen.

User device, a second screen system and a method for rendering second screen information on a second screen

A method for fingerprinting wireless devices and a method for using a device fingerprint for identifying wireless devices. A monitoring station listens to a channel. For each received frame, the station measures the inter-arrival time from the end of the previously received frame to the end of the present frame, If possible, the station obtains the identity of the sender of the frame. If the sender is known, then the station stores the inter-arrival time in a histogram for the sender; the histogram becomes the fingerprint for the sender. Identification of a device begins by obtaining a number of inter-arrival times for an unknown sender and then matching these to stored fingerprints using a suitable similarity measure. The invention is particularly suitable for IEEE 802.11 and may for example be used to detect so-called MAC spoofing and as an additional layer of an identification protocol.

Method and device for fingerprinting of wireless communication devices

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 and a fingerprinting device for countering fingerprint forgery in a communication system. The fingerprinting device obtains and stores a reference fingerprint for a client device, generates and transmits decoy traffic that appears to originate from the client device, the decoy traffic having different fingerprinting properties than real traffic from the client device, generates a fingerprint for non-decoy traffic purportedly from the client device, and compares the generated fingerprint with a reference fingerprint. A forged fingerprint is detected if there is a mismatch. The decoy traffic preferably comprises frames to which no response is needed. The invention is particularly suited for 802.11 using fingerprints based on duration fields of received frames and the decoy traffic is then preferably probe request frames and null data frames.

Method and device for countering fingerprint forgery attacks in a communication system

A method for discovering emulated clients. A verifier sends a cryptographic challenge C to a client and preferably starts a timer. The client uses a deterministic key search algorithm to find the correct key and returns the result as a number of tries needed. The verifier then stops the timer if this was started and verifies that the result is correct and preferably that the response was timely. Also provided is a verifier.

Device and method using non-cycle accurate measurements for discovering emulated clients

A network, advantageously a home network, comprises a number of user devices, for example personal computers, game consoles and smartphones, each having an estimator application, preferably voluntarily installed by the user. The network further comprises a network device that acts as an interface between the network and an external network. The estimator applications measure the network traffic for its user device, while the network device in parallel generates an independent measurement of the network consumption. The measurements are then compared. If the difference between the sum of the measurements from the estimator applications and the measurement of the network device is below a fixed threshold, it is assumed that the measurements are valid for the considered measurement time interval. Otherwise, the difference is an indication that at least one estimation was incorrect.

Method and device for reliable estimation of network traffic

The invention relates to a method for inserting a new device in a community of devices wherein each device of the community is able to store insertion requests received from at least one new device and to forward these insertion requests to a device chosen by a user of the community for confirming authorization to join the community.

Method for inserting a new device in a community of devices

A device receives protected content and a license for the content, unprotects the content using an input key and retrieves a rule associated with the input key. The device then processes the content to create new content, retrieves at least one output key associated with the input key in the retrieved rule, protects the content using the output key and sends the newly protected content and the corresponding license. It is thus possible to impose a work flow as it is necessary for a device to store a particular key in order to access the content and as the rule imposes a particular output key depending on the input key. In a preferred embodiment, the content is scrambled using a symmetrical key that is encrypted by an asymmetrical key in the license. An alternate embodiment uses watermarking techniques instead of encryption. The invention finds particular use in video processing.

Device and method for digital processing management of content so as to enable an imposed work flow

A method for service delivery to a client, in which the client selects a service, and establishes a connection with a system server to which it sends an identity associated with the client and an identifier of the service. The system server verifies that the client is authorized to access to the service and that the client is non-emulated. If this is verified, the service is provided to the client. In a preferred embodiment, the service is scrambled content and the system server provides a descrambling key to the client, and instructs a content server to provide the scrambled content to the client. Also claimed are a device, a system, and a system server.

Device, system and method for service delivery with anti-emulation mechanism

A system for distribution of a content item in a network, particularly a peer-to-peer network. A requesting node sends a request for the content item. An access requirement value for the content item is compared to a counter value for the requesting node to determine if the requesting node may download the content item from a sharing node. The counter value is advantageously linked to the requesting node's habit of sharing content items. The access requirement value, which preferably is not only linked to the size of the content item, is modified for at least one content item in the network, either following a time rule or when the content is downloaded. In this way it can be ensured that initial downloaders are likely to share the content item and that the content then gets more accessible to other nodes.

Growing community of inventors

Domloup, France

Olivier Heen