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| Number | Title | Issue Date |
| 8190887 | Cable network system and method for controlling security in cable network encrypted dynamic multicast session A security control method in a cable network dynamic multicast session, and more particularly, a method of controlling forward secrecy and backward secrecy in a Data Over Cable Service Interface Specifications (DOCSIS) 3.0 network dynamic multicast session is provid... | 05/29/2012 |
| 8145901 | System and method for nodes communicating in a shared network segment The invention provides a method and system for a network which includes a plurality of nodes, preferably routers, a shared network segment for communication between the nodes, and several multicast channels in the shared network segment on which the nodes, preferabl... | 03/27/2012 |
| 8140844 | Server apparatus, terminal device, and method for performing IP multicast communication A presence table stores therein presence information. A storage unit stores therein in associated manner a terminal identifier unique each of a plurality of terminals and an encryption key to be used for multicast communication within a multicast group. A receiving ... | 03/20/2012 |
| 8132000 | 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,... | 03/06/2012 |
| 8117440 | Methods and apparatus for enabling unified (internet protocol version) IPV6/IPV4 routing services over IPv4-only interfaces Some embodiments of the present invention provide an apparatus that provides routing services between a red network and a black network. The apparatus includes a red router within the red network, a black router within the black network, and an IP encryptor having a... | 02/14/2012 |
| 8086851 | Methods for broadcasting and receiving a scrambled multimedia programme, network head, terminal, receiver and security processor for these methods A method of broadcasting a scrambled multimedia program, by way of a broadcast network, in which before transmitting a license key; a network head carries out a step of authenticating a terminal, and if the terminal has successfully authenticated, the network heads ... | 12/27/2011 |
| 8086849 | Secure internet-scale eventing A method and system are provided for delivering event messages in a secure scalable manner. A network includes an event distribution device serving as an event generation device for generating and disseminating an event message through the network to event distribut... | 12/27/2011 |
| 8086850 | Secure group communication among wireless devices with distributed trust In one embodiment, a method of forming a secure group from a plurality of nodes for communicating with a user A comprises performing a discover protocol, wherein after performing the discover protocol, all nodes belong to at most one small group and wherein all node... | 12/27/2011 |
| 8078868 | Multi-party encryption systems and methods A cryptographic communication system and method having a first plurality of stations, each of the first plurality of stations having at least one encryption key Kj, were j is a number greater than 2, a data packet D to be viewed by each of the first plura... | 12/13/2011 |
| 8037303 | 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; gener... | 10/11/2011 |
| 7987360 | Method for implementing grouping devices and interacting among grouped devices In a method for implementing device grouping and interactions between grouped devices a device creating a device group sends an advertisement message carrying identification information of a device group to which it belongs, to the network. After receiving the adver... | 07/26/2011 |
| 7966489 | Method and apparatus for selecting an appropriate authentication method on a client In one embodiment, a method for facilitating authentication and ease the configuration of authentication includes receiving a credential type selection and selecting one or more authentication types based on the credential type selection and one or more policies set... | 06/21/2011 |
| 7917748 | Secure group secret distribution A method for distributing group secrets (e.g., group ID and password combinations) for use in communication systems such as trunked radio communication systems. A user group record containing one or more group secrets is encrypted at an administrator using a user se... | 03/29/2011 |
| 7904714 | 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 ... | 03/08/2011 |
| 7877602 | Transparent aware data transformation at file system level for efficient encryption and integrity validation of network files A mechanism for enabling efficient encryption and integrity validation of network files. When a request to read a file stored in a local network file system is received, the local network file system examines cryptographic attributes associated with the file to dete... | 01/25/2011 |
| 7865723 | Method and apparatus for multicast delivery of program information Method and apparatus providing program information to client devices for at least one multicast stream of digital content is described. In one embodiment, session description messages for the at least one multicast stream of digital content are generated. Each of th... | 01/04/2011 |
| 7836300 | Security integrated circuit A semiconductor integrated circuit for the processing of conditional access television signals, the circuit including an input interface for receiving encrypted television signals and an output interface for output of decrypted television signals. Control signals br... | 11/16/2010 |
| 7774598 | 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... | 08/10/2010 |
| 7774597 | System and method for nodes communicating in a shared network segment The invention provides a method and system for a network which includes a plurality of nodes, preferably routers, a shared network segment for communication between the nodes, and several multicast channels in the shared network segment on which the nodes, preferabl... | 08/10/2010 |
| 7757082 | Efficient revocation of receivers Methods and apparatus for efficient revocation of receivers. In one implementation, a method of broadcast encryption includes: assigning a respective master key to each of a plurality of receivers, where each master key can be used to derive two or more of a plurali... | 07/13/2010 |
| 7752435 | 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 furt... | 07/06/2010 |
| 7743249 | Method of securing a document in a system and controlling access to the document and a seal for use in the method An efficient multicast key management is achieved by using seals. A security server generates a seal. In one embodiment, the seal contains a key. In another embodiment, the seal contains information for generating a key. An application server requests the seal from ... | 06/22/2010 |
| 7721089 | 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 s... | 05/18/2010 |
| 7707410 | Information processing system and method An enabling key block (EKB) used in an encrypted key distributing tree structure is generated by forming a simplified 2-branch or multi-branch type tree with a terminal node or leaf which is capable of decrypting on the basis of a key corresponding to a node or a le... | 04/27/2010 |
| 7702905 | Method for distributing keys for encrypted data transmission in a preferably wireless sensor network In a method for distributing keys for encrypted data transmission in a sensor network, nodes store a subset of keys from a set of keys. A sink node triggers the key election procedure and sensor nodes choose from a locally broadcasted keyID list, with one key to be ... | 04/20/2010 |
| 7702904 | Key management system and multicast delivery system using the same In a multicast delivery system, A delivery server enciphers delivery data by using a current use cipher key to generate enciphered data and transmits a multicast packet containing the enciphered data and a current use key identifier indicative of a pair of the curre... | 04/20/2010 |
| 7698551 | Method for broadcast encryption and key revocation of stateless receivers A tree is used to partition stateless receivers in a broadcast content encryption system into subsets. Two different methods of partitioning are disclosed. When a set of revoked receivers is identified, the revoked receivers define a relatively small cover of the no... | 04/13/2010 |
| 7673136 | Method for secure multicast repeating on the public Internet A system and method for sending a secure multicast transmission. The system includes a computer system coupled to a public network and configured to generate a multicast broadcast, and encrypt the generated multicast broadcast. The system also includes a router coup... | 03/02/2010 |
| 7660983 | Method and apparatus for creating a secure communication channel among multiple event service nodes An approach for establishing secure multicast communication among multiple event service nodes is disclosed. The event service nodes, which can be distributed throughout an enterprise domain, are organized in a logical tree that mimics the logical tree arrangement o... | 02/09/2010 |
| 7660982 | Subscription broadcast security system A subscription broadcast security system for preventing theft of an encrypted program datastream utilizes an encryption protocol with steganographic supplementation. A decoder includes a decryption chip containing numerous decryption codes and an ID chip having a co... | 02/09/2010 |
| 7650500 | Encryption communication system An encryption communication system, comprising a communication relay device that connects a first network and a second network, for encrypting a communication within the first network and a communication within the second network in a network system configured so th... | 01/19/2010 |
| 7636841 | Systems and methods for secure data exchange in a distributed collaborative application A collaborative communication system that includes a plurality of endpoints and interconnecting nodes configured to communicate via messages over interconnecting channels. Each of the plurality of endpoints and/or interconnecting nodes can determine whether to apply... | 12/22/2009 |
| 7627755 | 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 s... | 12/01/2009 |
| 7610485 | System for providing secure multi-cast broadcasts over a network A system for providing secure multi-cast broadcasts. The system includes a broadcasting processing system, a security server processing system, and at least one receiving processing system. The security server provides an encryption key to the broadcasting processin... | 10/27/2009 |
| 7587591 | 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,... | 09/08/2009 |
| 7577837 | Method and apparatus for encrypted unicast group communication A process for managing encrypted group communication according to a single security association (SA) for network traffic from a sender includes receiving a request for an encrypted communication among a plurality of network devices. A common decryption key and a com... | 08/18/2009 |
| 7543143 | Service data multicasting system and method therefor and security key generating system In a mobile communication system, upon multicasting a service data through a common channel in a radio communication area, a user not subscribing is disabled a multicasted service data, and charge can be applied only for the subscribing user. As a generating method ... | 06/02/2009 |
| RE40708 | Dual encryption protocol for scalable secure group communication A logical tree structure and method for managing membership in a multicast group provides scalability and security from internal attacks. The structure defines key groups and subgroups, with each subgroup having a subgroup manager. Dual encryption allows the sender ... | 05/05/2009 |
| 7523307 | Method for ensuring content protection and subscription compliance A method for enforcing compliance in both the copy protect domain and service subscription domain for streamed multicast data. Each content is encrypted with a title key that itself is encrypted with a channel unique key which is a hash of a session key and a channe... | 04/21/2009 |
| 7512789 | Mailing list server and mail transmission method thereof A mailing list server sends mail encrypted by an encryption method compatible with the mail user agent device likely to receive the mail. A mailing list server 20 receives a signed mail from a member and registers and manages the SMIMECapabilities of that mai... | 03/31/2009 |
