Abstract:
The invention relates to a device for preventing illegal exportation of a content protected by a global copy protection system to a local copy protection system. According to the invention, each content liable to be exported contains a unique identifier and the device comprises a table for storing unique identifiers of all contents that have already been exported through said device. The invention also relates to a method for recording a content received by such a device. This method comprises the steps consisting, if the copy is to be made for a local copy protection system, in checking whether the unique identifier of said content is contained in the table of said device; and should said checking be positive, in preventing the recording; andshould said checking be negative, in recording the content and storing said unique identifier in said table.
Abstract:
The invention relates to a local digital network comprising: at least one source device intended to broadcast data over the network; and at least one receiver device intended to receive said data. The source device uses a network active encryption key to encrypt data liable to be broadcast in the network and the receiver device contains: a network active decryption key for decrypting data encrypted using said active encryption key and at least one decryption key of the network for decrypting data encrypted with the aid of an encryption key used previously in the network. The invention also relates to the installing of new devices in such a network as well as the sending of data from a source device to a receiver device.
Abstract:
The invention relates to a method of processing data, encrypted according to an encryption method specific to a first domain such that they cannot be decrypted without the aid of a first secret specific to the first domain, these data being received in a presentation device connected to a network belonging to a second domain. The method comprises the steps consisting, for the presentation device, in: (a) transmitting to a processing device connected to the network at least a portion of said encrypted data; (b) receiving from said processing device at least one element being used to decrypt said received data with the aid of a second secret specific to the second domain, the second secret being contained in the presentation device.
Abstract:
The invention concerns a motor vehicle fuel drawing assembly comprising a housing (200) having a ring-shaped chamber (220) and a filter (100) arranged in said ring-shaped chamber. The invention is characterised in that it comprises at least a plastic annular lip (126, 136), cast in one single piece linked to the housing (200) or to the filter (100), made of a material capable of being elastically deformed, and shaped along an oblique direction relatively to the axis O-O of the filter (100) and the housing chamber (220), such that said lip (126, 136) is urged to rest, with elastic deformation, and along a direction with tangential components by its free end (127, 137), against the surface opposite (286, 296), the other surface of the filter (100) or of the housing (200) arranged substantially transversely to the axis (O-O) of the filter (100) of the housing (200) chamber (220) to ensure tightness at that level between the filter (100) and the housing (200).
Abstract:
Disclosed is a microwave window comprising a circular strip mounted in a circular waveguide section connected, on either side, to a rectangular waveguide containing a matching transformer. The diameter of the circular waveguide is smaller than the diagonal of the rectangle. A wall provides for impervious sealing with respect to the exterior between the rectangular waveguide and the circular waveguide section. Each wall is provided with an aperture included in a portion of cross-section common to the rectangular waveguide and to the circular waveguide section. The area of the aperture is smaller than the area of the portion of cross-section. The disclosed device can be applied to wideband power microwave windows with improved mechanical and electrical behavior.
Abstract:
Stateless deterministic network address translation (NAT) within a service provider network is described. A plurality of customer premise equipment (CPEs) positioned within customer networks and a NAT device positioned within a service provider network operate as ingress and egress for tunnels having network packets of a first network transport protocol that encapsulate inner network packets of a second network transport protocol. The NAT device stores a mapping table that maps, for each of the CPEs, a public network address of the first transport protocol to a public network address and restricted port range of the second transport protocol. The NAT device outputs control messages to communicate the respective restricted port range to each of the CPEs, and the CPEs provide network address translation within the customer networks at the ingress of the tunnels based on the restricted port range received from the NAT device of the service provider network.
Abstract:
A method for distributing content in a content distribution system is disclosed which comprises the steps of: encrypting at a Content Packager a content using a content encryption key to generate an encrypted content; sending the content encryption key to a Licensing Authority; receiving from the Licensing Authority a distribution key containing an encryption of the content decryption key (Kc) for a given set of authorized devices; creating a secure link between the content encryption key (Kc) and the content protected by this content encryption key using a signature of the content; and distributing the encrypted content together with the signature of the content. A method for receiving content distributed according to the above-mentioned method in a device able to play back the content is also disclosed where the content signature is checked before any play back of the content.
Abstract:
A method for checking a validity of a certificate (600) containing a key associated to a network device (601) in a network, comprises receiving at the network an encrypted content (611) and a validity index (630) associated to the content. The validity of the certificate is evaluated from a time index (606) contained within the certificate, the time index having a value corresponding to a time of issue of the certificate, and from the validity index associated to the encrypted content.
Abstract:
A translation data center (TDC) is described that provides cloud-based network protocol translation services. In an example system, the TDC is coupled to a first public network that includes client devices and operates according to a first network-layer protocol (NLP) and a second public network that includes content providers and operates according to a second NLP. Domain name servers within the first public network are updated to include records that resolve respective domain names for each of a plurality of content providers of the second public network to different, globally-routable network destination addresses assigned to the TDC. The TDC receives packets from the first network, transforms the packets from the first NLP to the second NLP and replaces network-layer destination addresses of the TDC with the network-layer destination addresses for the content providers.
Abstract:
The invention relates to a method for controlling digital rights of the “Play N times” type for a digital audio and/or video content, referred to as controlled content, the controlled content being consumed by a consumer on a consuming device or on another device delegating the controlling of these rights to the consuming device. According to this method, charging of one additional usage is inhibited in at least one of the following cases where: the consumer momentarily consumes another content, on the same device where the controlled content is consumed, and then returns to the controlled content; the consumer effects a pause in the usage of the controlled content; the consumer performs a fast-forward of the controlled content; or the consumer performs a rewind of the controlled content.