Abstract: Systems and techniques are described herein for processing media content. For example, an item of media content and a content identifier associated with the item of media content can be obtained. Based on the content identifier, a customization profile, a first media platform, and a second media platform associated with the item of media content can be determined. The customization profile can be provided to the first media platform and to the second media platform.

Abstract: A technique to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at lease a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

Abstract: A technique to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at lease a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

Abstract: A technique to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at lease a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

Abstract: A device to reduce bandwidth necessary for renewal of subscriptions for reception of broadcast services including: defining a plurality of sets of subscriber identification numbers, each set being associated with a product; splitting a set of subscriber identification numbers into groups of subscribers; searching for an available subscriber identification number related to the desired product at the time of initialization of a new subscriber; confirming that an inhibit duration has elapsed between the end of the previous subscription and the start of the new subscription; sending an initialization message to the new subscriber addressed with his unique identification address and containing the subscriber identification number of, and rights to, his product; preparing a group rights renewal message for the product to the group containing the subscriber identification number, this message comprising the group header containing this subscriber and a compressed bitmap for individually addressing each of the group

Abstract: A technique to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at lease a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

Abstract: A technique to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at lease a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

Abstract: A method for conditional access to a digital data stream encrypted with at least one control word and broadcasted to at least one mobile device, said transmitter also transmitting a control message stream containing control words and access conditions, said mobile device being connected to a mobile communication network via a mobile access point, comprises: receiving the control message stream by the mobile device; determining a location identifier for the said mobile device by either the identifier of the mobile access point or the identifier of the broadcasting network transmitter; verifying access conditions contained in the control message, said access conditions comprising a reception condition related to a mobile access point identifier and/or an identifier of one broadcasting network transmitter; comparing the determined identifier with the identifier(s) contained in the access conditions; and authorizing or blocking the access to said data stream depending on the result of the comparison.

Abstract: The invention concerns a method for providing a plurality of receivers with conditional access to broadcast services using a simplified means for managing the control messages required by such conditional access schemes. The method involves providing all information which will allow a registered receiver having the necessary decryption key to access the services without having any prior rights loaded locally. A management center keeps a register of all subscribed receivers, including a list of services to which the receiver is subscribed, and encrypts the services using control words encrypted by the necessary keys. Control messages comprising the control words for decryption are provided within a special channel to which the receiver has permanent access, the special channel being a different one from channels used for broadcasting audio/video services.

Abstract: A technique to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at lease a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

Abstract: A device to reduce bandwidth necessary for renewal of subscriptions for reception of broadcast services including: defining a plurality of sets of subscriber identification numbers, each set being associated with a product; splitting a set of subscriber identification numbers into groups of subscribers; searching for an available subscriber identification number related to the desired product at the time of initialization of a new subscriber; confirming that an inhibit duration has elapsed between the end of the previous subscription and the start of the new subscription; sending an initialization message to the new subscriber addressed with his unique identification address and containing the subscriber identification number of, and rights to, his product; preparing a group rights renewal message for the product to the group containing the subscriber identification number, this message comprising the group header containing this subscriber and a compressed bitmap for individually addressing each of the group

Abstract: A method to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at least a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

Abstract: A method to reduce bandwidth necessary for renewal of subscriptions for reception of broadcast services including: defining a plurality of sets of subscriber identification numbers, each set being associated with a product; splitting a set of subscriber identification numbers into groups of subscribers; searching for an available subscriber identification number related to the desired product at the time of initialization of a new subscriber; confirming that an inhibit duration has elapsed between the end of the previous subscription and the start of the new subscription; sending an initialization message to the new subscriber addressed with his unique identification address and containing the subscriber identification number of, and rights to, his product; preparing a group rights renewal message for the product to the group containing the subscriber identification number, this message comprising the group header containing this subscriber and a compressed bitmap allowing to individually address each of the

Abstract: 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.

Abstract: A first variant of the process includes receiving an encrypted stream representing a service, this stream comprising a data channel and an ECM channel; slicing the stream to send it in packets to a mobile receiver; extracting the control message channel of this stream; forming a block containing the data channel, compatible with the diffusion to the receiver; extracting from the sliced stream a control message and introducing the control message into the block, in order to form a packet. A second variant of the process includes receiving an encrypted stream, this stream comprising a data channel and an ECM channel; cutting the stream; forming a block from the stream, comprising the data channel and the ECM channel, compatible with the diffusion to receivers; determining identical messages of the ECM channel repeated in the block and eliminating identical repeated messages, while conserving at least one of the identical messages.

Abstract: A method for protecting multimedia data exchanged between a multimedia processing device and a security module managed by a management center, the multimedia processing device receiving an encrypted multimedia data, decrypting the encrypted multimedia data and converting the decrypted multimedia data, said multimedia processing device including a personal key, the method comprising obtaining an identifier pertaining to an entity representing a group of multimedia processing devices, calculating a security key formed by a one-way function based on the personal key of the processing multimedia device and the entity identifier, transmitting this security key and the entity identifier to the security module connected to said multimedia processing device, calculating the security key using a one-way function based on the personal key of said multimedia processing device and the entity identifier, and using the calculated security key to secure the data exchanged between the multimedia processing device and the sec

Abstract: A method to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at least a net group access key encrypted so that only non revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

Abstract: The invention concerns a method for accessing services by a user unit, said services being a subset of all services broadcast by a management center and comprising at least two services, said subset of services defining a package, each service being simultaneously broadcast and containing audio/video data, the data of a service being encrypted by at least one control word, the method comprising the steps of: determining in a management center, the package a user unit is entitled to access to; determining in said management center a unique key pertaining to said user unit; forming a message containing at least one control word for each service of the package for which the user's unit is entitled, said control word being secured by the key pertaining to said user unit so that said key must be used to obtain the control word; transmitting to at least said user unit said message on at least one channel accessible whatever the selected service is.

Abstract: A method to reduce bandwidth necessary for renewal of subscriptions for reception of broadcast services including: defining a plurality of sets of subscriber identification numbers, each set being associated with a product; splitting a set of subscriber identification numbers into groups of subscribers; searching for an available subscriber identification number related to the desired product at the time of initialization of a new subscriber; confirming that an inhibit duration has elapsed between the end of the previous subscription and the start of the new subscription; sending an initialization message to the new subscriber addressed with his unique identification address and containing the subscriber identification number of, and rights to, his product; preparing a group rights renewal message for the product to the group containing the subscriber identification number, this message comprising the group header containing this subscriber and a compressed bitmap allowing to individually address each of the

Abstract: A method that allows the optimization of the consumption of conditional access content in order to guarantee less vulnerable right messages involves three steps: the selection by the user of a content and the indication of this interest to said management center; the sending of a notification message containing or indicating the access authorisation message shortly before the broadcast of said content and storage of this authorisation message; and the sending of the content itself and the use of the data of the authorisation message in order to access the data of the content. There may be a fourth stage, namely the validation of the authorisation message by the user. This validation is executed in general at the time of the reception of the content or alternatively the user confirms their intention to purchase.