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Electrical Computers And Digital Processing Systems: Support > Multiple Computer Communication Using Cryptography > Having Particular Address Related Cryptography > Multicast MulticastMulticast patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/08/07 - 20070260879 - Method of authenticating multicast messages A method of message authentication in communication networks with multicast-enabled routers or switches is disclosed. The latter are tasked to support the packet source authentication: On reception of a multicast packet, the router attests the authenticity of the sender of the packet, and adds corresponding authentication information to the packet, ... 09/13/07 - 20070214359 - System and method for providing secure multicasting across virtual private networks A method is provided for securely transmitting multicast data across an unsecured public network. Such a method includes receiving a join message identifying at least one private multicast group; mapping the private multicast group to a public multicast group; generating a membership report specifying the public multicast group; and sending ... 08/16/07 - 20070192594 - Apparatus and method for ciphering/deciphering a signal in a communication system In a communication system, second encryption information is generated using first encryption information when data to be transmitted is generated. The data is encrypted using the second encryption information and third encryption information. A signal including the encrypted data and the first encryption information is generated and transmitted. ... 08/02/07 - 20070180237 - Apparatus and methods for interaction between message groups and encryption methods A method and apparatus to process an outgoing electronic communication is described. The method may comprise, at a messaging client, retrieving members of a message group together with an encryption mechanism for each of the members, encrypting an outgoing electronic communication using the encryption mechanisms and sending the outgoing encrypted ... 06/21/07 - 20070143600 - Rekeying in secure mobile multicast communications A method of inter-area rekeying of encryption keys in secure mobile muiticast communications, in which a Domain Group Controller Key Server (Domain GCKS) distributes Traffic Encryption Keys (TEK) to a plurality of local Group Controller Key Servers (local GCKS), and said local Group Controller Key Servers forward said Traffic Encryption ... 04/05/07 - 20070079118 - Method of managing a key of user for broadcast encryption A method of managing a key of a user for a broadcast encryption. The method includes forming a tree comprising m hierarchies by repeating a process of setting a ith level comprising groups into which at least one node is grouped in a unit of ni, and setting a i+1th ... 03/22/07 - 20070067622 - Management apparatus, terminal apparatus, and copyright protection system A management apparatus reduces the number of pieces of unique information each not generated from another piece of unique information, among unique information being bases of keys assigned to managed apparatuses. The management apparatus calculates, for nodes in layers other than tree structure leaves, subsets of apparatus identifiers subordinate to ... 03/15/07 - 20070061569 - Inter-entity coupling method, apparatus and system for service protection Disclosed is an inter-entity coupling method for service protection in a broadcast environment including a terminal and a broadcast network, which includes a Broadcast Service Application (BSA), a Broadcast Service Distribution (BSD) and a Broadcast Service Management (BSM) function. The method includes executing enrollment and service joining procedures for the ... 03/15/07 - 20070061568 - Inter-entity coupling method, apparatus and system for content protection Disclosed is an inter-entity coupling method for protecting content in a broadcast environment including a broadcast network and a terminal, the broadcast network having a Broadcast Service Application (BSA), a Broadcast Service Distribution (BSD), and a Broadcast Service Management (BSM), the inter-entity coupling method including performing, by the terminal, a ... 02/01/07 - 20070028099 - Secure multicast transmission A method of multicasting data. The method includes providing a data block for multicasting, generating a plurality of segments that represent the data block, such that a receiver needs to receive fewer than all the generated segments in order to reconstruct the data block, encrypting at least a portion of ... 01/25/07 - 20070022286 - Method and apparatus for providing a multi-user encrypted environment A method and system are disclosed for providing a multi-user encrypted environment to each of a plurality of user groups. Each user group has a plurality of corresponding users. The system comprises a plurality of virtual network interface cards, each for authenticating and communicating according to a corresponding encryption scheme. ... 01/18/07 - 20070016769 - Broadcast encryption using rsa Methods, components and systems for implementing secure and efficient broadcast encryption schemes with configurable and practical tradeoffs among a pre-broadcast transmission bandwidth t, a key storage cost k, and a key derivation cost c, in which the schemes use subtree difference and key decomposition to generate secondary keys, use the ... 01/04/07 - 20070005958 - Cipher method and system for multicast service A cipher method and system for multicast service. A group includes multiple user equipment, each having a respective key. The keys are orthogonal to one another. A content provider provides a raw message to the user equipment of the group. A BM-SC server has a key set composed of the ... 12/14/06 - 20060282666 - Key management method for broadcast encryption in tree topology network A key management method for broadcast encryption in a tree topology network which includes a plurality of nodes is provided. The method includes forming a plurality of first node groups each of which includes a node at a second layer and nodes, which belong to the node at the second ... 11/30/06 - 20060271780 - Providing a multicast service using a multicast group-source key Providing a multicast service to a mobile node includes receiving a first request to join a multicast group from a first cell site. The first request requests that a first mobile node be permitted to join the multicast group. A first multicast source operable to provide content to the first ... 09/14/06 - 20060206708 - Method for managing digital rights in broadcast/multicast service A method of digital rights management for a broadcast-multicast service, the method comprising receiving a request from a terminal to join a service domain having a common group key; transmitting encryption of one or more service encryption keys using the common group key to the terminal that requested to join; ... 07/27/06 - 20060168446 - Secure broadcast/multicast service A method of authenticating candidate members 1 wishing to participate in an IP multicast via a communication network, where data sent as part of the multicast is to be encrypted using a Logical Key Hierarchy based scheme requiring that each candidate member submit a public key to a group controller. ... 07/06/06 - 20060149965 - System, method and computer program product for detecting a rogue member in a multicast group A system for multicasting a data packet in a multicast group includes a network entity, and a plurality of members of the multicast group. A member can notify the network entity of a rogue member of the group claiming an identity of a spoofed member of the group. In response ... 06/15/06 - 20060129807 - Wireless authentication protocol A wireless authentication protocol. Access to a network is managed by providing a challenge-handshake protocol within the Extensible Authentication Protocol for authentication between a client and the network. ... 05/18/06 - 20060107043 - Method for managing user key for broadcast encryption A method of managing a user key for a broadcast encryption. The method includes assigning numbers to respective users and arranging the users on a ring-shaped structure in order to map hash chains onto the respective nodes of a ring-shaped structure. The method further includes making random node keys correspond ... 04/27/06 - 20060090069 - Method and system for caching read requests from a shared image in a computer network A shared image stored in a server is shared by a plurality of clients. The shared image includes data that may be downloaded over a computer network to each of the clients. To conserve network bandwidth when downloading the data, upon receiving a request from one of the clients to ... 02/23/06 - 20060041745 - Apparatus and method for conveying private information within a group communication system An apparatus and method allow for distribution of a streamed signal within a group of users in a computer network, the users accessing client terminals (10, 20, 30, 40) for participation in a multicast session. The apparatus includes connecting links (12, 22, 32, 42) adapted to connect the client terminals ... 12/01/05 - 20050268091 - Secure distributed time service in the fabric environment A secure and distributed time service is discussed for use in a network. In particular, the invention relates to Fibre Channel networks and the secure distribution of time service using a push model. In order to distribute time on a push model, one entity assumes responsibility for time in the ... 08/11/05 - 20050177719 - Key management for content protection A method for content access control operative to enable authorized devices to access protected content and to prevent unauthorized devices from accessing protected content, the method comprising: providing a plurality of authorized devices; dividing the plurality of authorized devices into a plurality of groups, each of the plurality of authorized ... 07/14/05 - 20050154883 - Key management for content protection A method for content access control operative to enable authorized devices to access protected content and to prevent unauthorized devices from accessing protected content, the method comprising: providing a plurality of authorized devices; dividing the plurality of authorized devices into a plurality of groups, each of the plurality of authorized ... 06/23/05 - 20050138369 - Secure transport of multicast traffic Secure tunneled multicast transmission and reception through a network is provided. A join request may be received from a second tunnel endpoint, the join request indicating a multicast group to be joined. Group keys may be transmitted to the second tunnel endpoint, where the group keys are based at least ... ### FreshPatents.com Support |